491490586 has 4 divisors (see below), whose sum is σ = 737235882. Its totient is φ = 245745292.

The previous prime is 491490583. The next prime is 491490589. The reversal of 491490586 is 685094194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (491490583) and next prime (491490589).

It can be written as a sum of positive squares in only one way, i.e., 485364961 + 6125625 = 22031^2 + 2475^2 .

It is a super-2 number, since 2×491490586² = 483125992253246792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491490581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122872645 + ... + 122872648.

Almost surely, 2^491490586 is an apocalyptic number.

491490586 is a deficient number, since it is larger than the sum of its proper divisors (245745296).

491490586 is a wasteful number, since it uses less digits than its factorization.

491490586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245745295.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 491490586 is about 22169.5869605187. The cubic root of 491490586 is about 789.1721210321.

The spelling of 491490586 in words is "four hundred ninety-one million, four hundred ninety thousand, five hundred eighty-six".