634502431 has 2 divisors, whose sum is σ = 634502432. Its totient is φ = 634502430.

The previous prime is 634502423. The next prime is 634502443. The reversal of 634502431 is 134205436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634502431 - 2³ = 634502423 is a prime.

It is a super-2 number, since 2×634502431² = 805186669889819522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 634502431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634508431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317251215 + 317251216.

It is an arithmetic number, because the mean of its divisors is an integer number (317251216).

Almost surely, 2^634502431 is an apocalyptic number.

634502431 is a deficient number, since it is larger than the sum of its proper divisors (1).

634502431 is an equidigital number, since it uses as much as digits as its factorization.

634502431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 634502431 is about 25189.3316902216. The cubic root of 634502431 is about 859.2992448238.

Adding to 634502431 its reverse (134205436), we get a palindrome (768707867).

The spelling of 634502431 in words is "six hundred thirty-four million, five hundred two thousand, four hundred thirty-one".