624921413 has 2 divisors, whose sum is σ = 624921414. Its totient is φ = 624921412.

The previous prime is 624921397. The next prime is 624921461. The reversal of 624921413 is 314129426.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586753729 + 38167684 = 24223^2 + 6178^2 .

It is a cyclic number.

It is not a de Polignac number, because 624921413 - 2⁴ = 624921397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 624921413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624921113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312460706 + 312460707.

It is an arithmetic number, because the mean of its divisors is an integer number (312460707).

Almost surely, 2^624921413 is an apocalyptic number.

It is an amenable number.

624921413 is a deficient number, since it is larger than the sum of its proper divisors (1).

624921413 is an equidigital number, since it uses as much as digits as its factorization.

624921413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 624921413 is about 24998.4282105896. The cubic root of 624921413 is about 854.9521366684.

The spelling of 624921413 in words is "six hundred twenty-four million, nine hundred twenty-one thousand, four hundred thirteen".