999931323613 has 2 divisors, whose sum is σ = 999931323614. Its totient is φ = 999931323612.

The previous prime is 999931323607. The next prime is 999931323617. The reversal of 999931323613 is 316323139999.

999931323613 = 707082² + 707083².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499966368889 + 499964954724 = 707083^2 + 707082^2 .

It is a cyclic number.

It is not a de Polignac number, because 999931323613 - 2¹⁷ = 999931192541 is a prime.

It is a super-2 number, since 2×999931323613² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999931323617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499965661806 + 499965661807.

It is an arithmetic number, because the mean of its divisors is an integer number (499965661807).

Almost surely, 2^999931323613 is an apocalyptic number.

999931323613 is the 707083-rd centered square number.

It is an amenable number.

999931323613 is a deficient number, since it is larger than the sum of its proper divisors (1).

999931323613 is an equidigital number, since it uses as much as digits as its factorization.

999931323613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6377292, while the sum is 58.

The spelling of 999931323613 in words is "nine hundred ninety-nine billion, nine hundred thirty-one million, three hundred twenty-three thousand, six hundred thirteen".