The Number

491

Four Hundred and Ninety-One

In Base 8 Octal Is

7538

The numbers with a 8 subscript use Base 8 Octal notation.

For more familiar numbers: See Four Hundred and Ninety-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

488
7508
Four Hundred and Eighty-Eight in Base 8 Octal
489
7518
Four Hundred and Eighty-Nine in Base 8 Octal
490
7528
Four Hundred and Ninety in Base 8 Octal
492
7548
Four Hundred and Ninety-Two in Base 8 Octal
493
7558
Four Hundred and Ninety-Three in Base 8 Octal
494
7568
Four Hundred and Ninety-Four in Base 8 Octal

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

4.91e2

Reciprocal

A number multiplied with its reciprocal is one.

0.0010257136710567313248

The reciprocal of 491 in Base 8 Octal.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 7538 is not a palindrome.

A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Four hundred and ninety-one is the 94th prime number.   See primes in Base 8 Octal

Not A Composite

Composites have more than just these two factors.

Four Hundred and Ninety-One is not a composite number because it has exactly two factors: One and Four Hundred and Ninety-One

Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number four hundred and ninety-one has the following 1 prime factor:

491
7538
Four Hundred and Ninety-One in Base 8 Octal

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

75381 = 7538

Base Conversions

The number four hundred and ninety-one in 35 different bases