626622631 has 4 divisors (see below), whose sum is σ = 626773552. Its totient is φ = 626471712.

The previous prime is 626622613. The next prime is 626622643. The reversal of 626622631 is 136226626.

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 626622631 - 2⁹ = 626622119 is a prime.

It is a super-2 number, since 2×626622631² = 785311843362724322, 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 (626622611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69051 + ... + 77596.

It is an arithmetic number, because the mean of its divisors is an integer number (156693388).

Almost surely, 2^626622631 is an apocalyptic number.

626622631 is a deficient number, since it is larger than the sum of its proper divisors (150921).

626622631 is a wasteful number, since it uses less digits than its factorization.

626622631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150920.

The product of its digits is 31104, while the sum is 34.

The square root of 626622631 is about 25032.4315838474. The cubic root of 626622631 is about 855.7272432685.

The spelling of 626622631 in words is "six hundred twenty-six million, six hundred twenty-two thousand, six hundred thirty-one".