631925901 has 16 divisors (see below), whose sum is σ = 951536320. Its totient is φ = 414376560.

The previous prime is 631925891. The next prime is 631925911. The reversal of 631925901 is 109529136.

631925901 is a `hidden beast` number, since 63 + 1 + 9 + 2 + 590 + 1 = 666.

631925901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631925891) and next prime (631925911).

It is not a de Polignac number, because 631925901 - 2²² = 627731597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631925911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190195 + ... + 193488.

It is an arithmetic number, because the mean of its divisors is an integer number (59471020).

Almost surely, 2^631925901 is an apocalyptic number.

631925901 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

631925901 is a deficient number, since it is larger than the sum of its proper divisors (319610419).

631925901 is a wasteful number, since it uses less digits than its factorization.

631925901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383753 (or 383747 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 631925901 is about 25138.1363867730. The cubic root of 631925901 is about 858.1345453829.

The spelling of 631925901 in words is "six hundred thirty-one million, nine hundred twenty-five thousand, nine hundred one".