623883913 has 2 divisors, whose sum is σ = 623883914. Its totient is φ = 623883912.

The previous prime is 623883893. The next prime is 623883919. The reversal of 623883913 is 319388326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332259984 + 291623929 = 18228^2 + 17077^2 .

It is a cyclic number.

It is not a de Polignac number, because 623883913 - 2⁵ = 623883881 is a prime.

It is a super-2 number, since 2×623883913² = 778462273800383138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 623883913.

It is not a weakly prime, because it can be changed into another prime (623883919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311941956 + 311941957.

It is an arithmetic number, because the mean of its divisors is an integer number (311941957).

Almost surely, 2^623883913 is an apocalyptic number.

It is an amenable number.

623883913 is a deficient number, since it is larger than the sum of its proper divisors (1).

623883913 is an equidigital number, since it uses as much as digits as its factorization.

623883913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 623883913 is about 24977.6682858909. The cubic root of 623883913 is about 854.4787415864.

The spelling of 623883913 in words is "six hundred twenty-three million, eight hundred eighty-three thousand, nine hundred thirteen".