631939025 has 6 divisors (see below), whose sum is σ = 783604422. Its totient is φ = 505551200.

The previous prime is 631939019. The next prime is 631939037. The reversal of 631939025 is 520939136.

It can be written as a sum of positive squares in 3 ways, for example, as 2531281 + 629407744 = 1591^2 + 25088^2 .

It is not a de Polignac number, because 631939025 - 2¹⁰ = 631938001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 631939025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12638756 + ... + 12638805.

It is an arithmetic number, because the mean of its divisors is an integer number (130600737).

Almost surely, 2^631939025 is an apocalyptic number.

It is an amenable number.

631939025 is a deficient number, since it is larger than the sum of its proper divisors (151665397).

631939025 is a wasteful number, since it uses less digits than its factorization.

631939025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25277571 (or 25277566 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 631939025 is about 25138.3974230658. The cubic root of 631939025 is about 858.1404859949.

The spelling of 631939025 in words is "six hundred thirty-one million, nine hundred thirty-nine thousand, twenty-five".