623976013 has 2 divisors, whose sum is σ = 623976014. Its totient is φ = 623976012.

The previous prime is 623975987. The next prime is 623976061. The reversal of 623976013 is 310679326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519976809 + 103999204 = 22803^2 + 10198^2 .

It is a cyclic number.

It is not a de Polignac number, because 623976013 - 2⁵ = 623975981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623976113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311988006 + 311988007.

It is an arithmetic number, because the mean of its divisors is an integer number (311988007).

Almost surely, 2^623976013 is an apocalyptic number.

It is an amenable number.

623976013 is a deficient number, since it is larger than the sum of its proper divisors (1).

623976013 is an equidigital number, since it uses as much as digits as its factorization.

623976013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 623976013 is about 24979.5118647263. The cubic root of 623976013 is about 854.5207865984.

The spelling of 623976013 in words is "six hundred twenty-three million, nine hundred seventy-six thousand, thirteen".