312116387 has 4 divisors (see below), whose sum is σ = 340490616. Its totient is φ = 283742160.

The previous prime is 312116383. The next prime is 312116411. The reversal of 312116387 is 783611213.

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 312116387 - 2² = 312116383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312116381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14187098 + ... + 14187119.

It is an arithmetic number, because the mean of its divisors is an integer number (85122654).

Almost surely, 2^312116387 is an apocalyptic number.

312116387 is a deficient number, since it is larger than the sum of its proper divisors (28374229).

312116387 is a wasteful number, since it uses less digits than its factorization.

312116387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28374228.

The product of its digits is 6048, while the sum is 32.

The square root of 312116387 is about 17666.8159836457. The cubic root of 312116387 is about 678.3266142136.

The spelling of 312116387 in words is "three hundred twelve million, one hundred sixteen thousand, three hundred eighty-seven".