625774631 has 4 divisors (see below), whose sum is σ = 627220272. Its totient is φ = 624328992.

The previous prime is 625774621. The next prime is 625774651. The reversal of 625774631 is 136477526.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 625774631 - 2¹⁸ = 625512487 is a prime.

It is a super-2 number, since 2×625774631² = 783187777606372322, 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 (625774601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722171 + ... + 723036.

It is an arithmetic number, because the mean of its divisors is an integer number (156805068).

Almost surely, 2^625774631 is an apocalyptic number.

625774631 is a deficient number, since it is larger than the sum of its proper divisors (1445641).

625774631 is a wasteful number, since it uses less digits than its factorization.

625774631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445640.

The product of its digits is 211680, while the sum is 41.

The square root of 625774631 is about 25015.4878225471. The cubic root of 625774631 is about 855.3410542752.

The spelling of 625774631 in words is "six hundred twenty-five million, seven hundred seventy-four thousand, six hundred thirty-one".