625474631 has 4 divisors (see below), whose sum is σ = 645651264. Its totient is φ = 605298000.

The previous prime is 625474621. The next prime is 625474643. The reversal of 625474631 is 136474526.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136474526 = 2 ⋅68237263.

It is a cyclic number.

It is not a de Polignac number, because 625474631 - 2²² = 621280327 is a prime.

It is a super-2 number, since 2×625474631² = 782437028049172322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625474601) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10088270 + ... + 10088331.

It is an arithmetic number, because the mean of its divisors is an integer number (161412816).

Almost surely, 2^625474631 is an apocalyptic number.

625474631 is a deficient number, since it is larger than the sum of its proper divisors (20176633).

625474631 is a wasteful number, since it uses less digits than its factorization.

625474631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20176632.

The product of its digits is 120960, while the sum is 38.

The square root of 625474631 is about 25009.4908184873. The cubic root of 625474631 is about 855.2043472671.

The spelling of 625474631 in words is "six hundred twenty-five million, four hundred seventy-four thousand, six hundred thirty-one".