634407925 has 18 divisors (see below), whose sum is σ = 798723618. Its totient is φ = 499862880.

The previous prime is 634407913. The next prime is 634407937. The reversal of 634407925 is 529704436.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (634407913) and next prime (634407937).

It can be written as a sum of positive squares in 3 ways, for example, as 97002801 + 537405124 = 9849^2 + 23182^2 .

It is not a de Polignac number, because 634407925 - 2¹⁹ = 633883637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 109399 + ... + 115051.

Almost surely, 2^634407925 is an apocalyptic number.

It is an amenable number.

634407925 is a deficient number, since it is larger than the sum of its proper divisors (164315693).

634407925 is an equidigital number, since it uses as much as digits as its factorization.

634407925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5797 (or 5725 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 634407925 is about 25187.4557071571. The cubic root of 634407925 is about 859.2565799141.

The spelling of 634407925 in words is "six hundred thirty-four million, four hundred seven thousand, nine hundred twenty-five".