491637954 has 16 divisors (see below), whose sum is σ = 1004197248. Its totient is φ = 160392432.

The previous prime is 491637947. The next prime is 491637989. The reversal of 491637954 is 459736194.

It is a super-2 number, since 2×491637954² = 483415755626612232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 871417 + ... + 871980.

It is an arithmetic number, because the mean of its divisors is an integer number (62762328).

Almost surely, 2^491637954 is an apocalyptic number.

491637954 is an abundant number, since it is smaller than the sum of its proper divisors (512559294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491637954 is a wasteful number, since it uses less digits than its factorization.

491637954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743449.

The product of its digits is 816480, while the sum is 48.

The square root of 491637954 is about 22172.9103637750. The cubic root of 491637954 is about 789.2509879855.

The spelling of 491637954 in words is "four hundred ninety-one million, six hundred thirty-seven thousand, nine hundred fifty-four".