491952631 has 2 divisors, whose sum is σ = 491952632. Its totient is φ = 491952630.

The previous prime is 491952599. The next prime is 491952649. The reversal of 491952631 is 136259194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491952631 - 2⁵ = 491952599 is a prime.

It is a super-2 number, since 2×491952631² = 484034782295644322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491952691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245976315 + 245976316.

It is an arithmetic number, because the mean of its divisors is an integer number (245976316).

Almost surely, 2^491952631 is an apocalyptic number.

491952631 is a deficient number, since it is larger than the sum of its proper divisors (1).

491952631 is an equidigital number, since it uses as much as digits as its factorization.

491952631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 491952631 is about 22180.0052073934. The cubic root of 491952631 is about 789.4193409790.

The spelling of 491952631 in words is "four hundred ninety-one million, nine hundred fifty-two thousand, six hundred thirty-one".