623371613 has 2 divisors, whose sum is σ = 623371614. Its totient is φ = 623371612.

The previous prime is 623371577. The next prime is 623371633. The reversal of 623371613 is 316173326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420537049 + 202834564 = 20507^2 + 14242^2 .

It is a cyclic number.

It is not a de Polignac number, because 623371613 - 2²² = 619177309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623371613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623371633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311685806 + 311685807.

It is an arithmetic number, because the mean of its divisors is an integer number (311685807).

Almost surely, 2^623371613 is an apocalyptic number.

It is an amenable number.

623371613 is a deficient number, since it is larger than the sum of its proper divisors (1).

623371613 is an equidigital number, since it uses as much as digits as its factorization.

623371613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 623371613 is about 24967.4110191666. The cubic root of 623371613 is about 854.2447935053.

The spelling of 623371613 in words is "six hundred twenty-three million, three hundred seventy-one thousand, six hundred thirteen".