626890631 has 4 divisors (see below), whose sum is σ = 626993952. Its totient is φ = 626787312.

The previous prime is 626890613. The next prime is 626890643. The reversal of 626890631 is 136098626.

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 626890631 - 2⁶ = 626890567 is a prime.

It is a super-2 number, since 2×626890631² = 785983726471156322, 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 (626890601) 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, 41951 + ... + 54896.

It is an arithmetic number, because the mean of its divisors is an integer number (156748488).

Almost surely, 2^626890631 is an apocalyptic number.

626890631 is a deficient number, since it is larger than the sum of its proper divisors (103321).

626890631 is an equidigital number, since it uses as much as digits as its factorization.

626890631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103320.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 626890631 is about 25037.7840672852. The cubic root of 626890631 is about 855.8492211027.

The spelling of 626890631 in words is "six hundred twenty-six million, eight hundred ninety thousand, six hundred thirty-one".