312087113 has 4 divisors (see below), whose sum is σ = 336093828. Its totient is φ = 288080400.

The previous prime is 312087107. The next prime is 312087131. The reversal of 312087113 is 311780213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311780213 = 97 ⋅3214229.

It can be written as a sum of positive squares in 2 ways, for example, as 36626704 + 275460409 = 6052^2 + 16597^2 .

It is a cyclic number.

It is not a de Polignac number, because 312087113 - 2¹² = 312083017 is a prime.

It is a super-2 number, since 2×312087113² = 194796732201349538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312087143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12003338 + ... + 12003363.

It is an arithmetic number, because the mean of its divisors is an integer number (84023457).

Almost surely, 2^312087113 is an apocalyptic number.

It is an amenable number.

312087113 is a deficient number, since it is larger than the sum of its proper divisors (24006715).

312087113 is a wasteful number, since it uses less digits than its factorization.

312087113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24006714.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 312087113 is about 17665.9874617866. The cubic root of 312087113 is about 678.3054063619.

The spelling of 312087113 in words is "three hundred twelve million, eighty-seven thousand, one hundred thirteen".