634618631 has 2 divisors, whose sum is σ = 634618632. Its totient is φ = 634618630.

The previous prime is 634618609. The next prime is 634618637. The reversal of 634618631 is 136816436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634618631 - 2¹⁴ = 634602247 is a prime.

It is a super-2 number, since 2×634618631² = 805481613624628322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634618637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317309315 + 317309316.

It is an arithmetic number, because the mean of its divisors is an integer number (317309316).

Almost surely, 2^634618631 is an apocalyptic number.

634618631 is a deficient number, since it is larger than the sum of its proper divisors (1).

634618631 is an equidigital number, since it uses as much as digits as its factorization.

634618631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 634618631 is about 25191.6381166450. The cubic root of 634618631 is about 859.3516977236.

The spelling of 634618631 in words is "six hundred thirty-four million, six hundred eighteen thousand, six hundred thirty-one".