631406725 has 6 divisors (see below), whose sum is σ = 782944370. Its totient is φ = 505125360.

The previous prime is 631406723. The next prime is 631406749. The reversal of 631406725 is 527604136.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 67914081 + 563492644 = 8241^2 + 23738^2 .

It is not a de Polignac number, because 631406725 - 2¹ = 631406723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631406723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12628110 + ... + 12628159.

Almost surely, 2^631406725 is an apocalyptic number.

It is an amenable number.

631406725 is a deficient number, since it is larger than the sum of its proper divisors (151537645).

631406725 is a wasteful number, since it uses less digits than its factorization.

631406725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25256279 (or 25256274 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 631406725 is about 25127.8078033083. The cubic root of 631406725 is about 857.8994730291.

The spelling of 631406725 in words is "six hundred thirty-one million, four hundred six thousand, seven hundred twenty-five".