625767631 has 2 divisors, whose sum is σ = 625767632. Its totient is φ = 625767630.

The previous prime is 625767587. The next prime is 625767673. The reversal of 625767631 is 136767526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625767631 - 2⁷ = 625767503 is a prime.

It is a super-2 number, since 2×625767631² = 783170256014704322, which contains 22 as substring.

It is equal to p_32598187 and since 625767631 and 32598187 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625767031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312883815 + 312883816.

It is an arithmetic number, because the mean of its divisors is an integer number (312883816).

Almost surely, 2^625767631 is an apocalyptic number.

625767631 is a deficient number, since it is larger than the sum of its proper divisors (1).

625767631 is an equidigital number, since it uses as much as digits as its factorization.

625767631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

The square root of 625767631 is about 25015.3479088339. The cubic root of 625767631 is about 855.3378649429.

It can be divided in two parts, 62576 and 7631, that added together give a palindrome (70207).

The spelling of 625767631 in words is "six hundred twenty-five million, seven hundred sixty-seven thousand, six hundred thirty-one".