634653131 has 4 divisors (see below), whose sum is σ = 725317872. Its totient is φ = 543988392.

The previous prime is 634653127. The next prime is 634653137. The reversal of 634653131 is 131356436.

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

It is a cyclic number.

It is not a de Polignac number, because 634653131 - 2² = 634653127 is a prime.

It is a super-2 number, since 2×634653131² = 805569193376206322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634653137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45332360 + ... + 45332373.

It is an arithmetic number, because the mean of its divisors is an integer number (181329468).

Almost surely, 2^634653131 is an apocalyptic number.

634653131 is a deficient number, since it is larger than the sum of its proper divisors (90664741).

634653131 is an equidigital number, since it uses as much as digits as its factorization.

634653131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90664740.

The product of its digits is 19440, while the sum is 32.

The square root of 634653131 is about 25192.3228583630. The cubic root of 634653131 is about 859.3672698562.

The spelling of 634653131 in words is "six hundred thirty-four million, six hundred fifty-three thousand, one hundred thirty-one".