631469925 has 60 divisors (see below), whose sum is σ = 1210147620. Its totient is φ = 325140480.

The previous prime is 631469873. The next prime is 631469933. The reversal of 631469925 is 529964136.

631469925 is a `hidden beast` number, since 631 + 4 + 6 + 9 + 9 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 13549761 + 617920164 = 3681^2 + 24858^2 .

It is not a de Polignac number, because 631469925 - 2¹¹ = 631467877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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 59 ways as a sum of consecutive naturals, for example, 53349 + ... + 64101.

It is an arithmetic number, because the mean of its divisors is an integer number (20169127).

Almost surely, 2^631469925 is an apocalyptic number.

It is an amenable number.

631469925 is a deficient number, since it is larger than the sum of its proper divisors (578677695).

631469925 is a wasteful number, since it uses less digits than its factorization.

631469925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10804 (or 10790 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 631469925 is about 25129.0653427460. The cubic root of 631469925 is about 857.9280955929.

The spelling of 631469925 in words is "six hundred thirty-one million, four hundred sixty-nine thousand, nine hundred twenty-five".