999912313 has 4 divisors (see below), whose sum is σ = 1005147648. Its totient is φ = 994676980.

The previous prime is 999912301. The next prime is 999912323. The reversal of 999912313 is 313219999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313219999 = 1787 ⋅175277.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999912313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999912323) 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 in 3 ways as a sum of consecutive naturals, for example, 2617381 + ... + 2617762.

It is an arithmetic number, because the mean of its divisors is an integer number (251286912).

Almost surely, 2^999912313 is an apocalyptic number.

It is an amenable number.

999912313 is a deficient number, since it is larger than the sum of its proper divisors (5235335).

999912313 is a wasteful number, since it uses less digits than its factorization.

999912313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5235334.

The product of its digits is 118098, while the sum is 46.

The square root of 999912313 is about 31621.3901180830. The cubic root of 999912313 is about 999.9707701456.

The spelling of 999912313 in words is "nine hundred ninety-nine million, nine hundred twelve thousand, three hundred thirteen".