312499999939 has 4 divisors (see below), whose sum is σ = 312682857120. Its totient is φ = 312317142760.

The previous prime is 312499999919. The next prime is 312500000027. The reversal of 312499999939 is 939999994213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312499999939 - 2⁵ = 312499999907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312499999919) 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 in 3 ways as a sum of consecutive naturals, for example, 91426027 + ... + 91429444.

It is an arithmetic number, because the mean of its divisors is an integer number (78170714280).

Almost surely, 2^312499999939 is an apocalyptic number.

312499999939 is a deficient number, since it is larger than the sum of its proper divisors (182857181).

312499999939 is a wasteful number, since it uses less digits than its factorization.

312499999939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182857180.

The product of its digits is 344373768, while the sum is 76.

The spelling of 312499999939 in words is "three hundred twelve billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred thirty-nine".