624636643 has 2 divisors, whose sum is σ = 624636644. Its totient is φ = 624636642.

The previous prime is 624636631. The next prime is 624636653. The reversal of 624636643 is 346636426.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 624636643 - 2¹³ = 624628451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 624636596 and 624636605.

It is not a weakly prime, because it can be changed into another prime (624636653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312318321 + 312318322.

It is an arithmetic number, because the mean of its divisors is an integer number (312318322).

Almost surely, 2^624636643 is an apocalyptic number.

624636643 is a deficient number, since it is larger than the sum of its proper divisors (1).

624636643 is an equidigital number, since it uses as much as digits as its factorization.

624636643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 40.

The square root of 624636643 is about 24992.7318034664. The cubic root of 624636643 is about 854.8222527578.

The spelling of 624636643 in words is "six hundred twenty-four million, six hundred thirty-six thousand, six hundred forty-three".