624686431 has 2 divisors, whose sum is σ = 624686432. Its totient is φ = 624686430.

The previous prime is 624686423. The next prime is 624686441. The reversal of 624686431 is 134686426.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 624686431 - 2³ = 624686423 is a prime.

It is a super-2 number, since 2×624686431² = 780466274151035522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624686401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312343215 + 312343216.

It is an arithmetic number, because the mean of its divisors is an integer number (312343216).

Almost surely, 2^624686431 is an apocalyptic number.

624686431 is a deficient number, since it is larger than the sum of its proper divisors (1).

624686431 is an equidigital number, since it uses as much as digits as its factorization.

624686431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 40.

The square root of 624686431 is about 24993.7278331985. The cubic root of 624686431 is about 854.8449639666.

The spelling of 624686431 in words is "six hundred twenty-four million, six hundred eighty-six thousand, four hundred thirty-one".