312739091 has 4 divisors (see below), whose sum is σ = 357416112. Its totient is φ = 268062072.

The previous prime is 312739087. The next prime is 312739093. The reversal of 312739091 is 190937213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190937213 = 19 ⋅10049327.

It is a cyclic number.

It is not a de Polignac number, because 312739091 - 2² = 312739087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312739093) 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, 22338500 + ... + 22338513.

It is an arithmetic number, because the mean of its divisors is an integer number (89354028).

Almost surely, 2^312739091 is an apocalyptic number.

312739091 is a deficient number, since it is larger than the sum of its proper divisors (44677021).

312739091 is an equidigital number, since it uses as much as digits as its factorization.

312739091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44677020.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 312739091 is about 17684.4307513700. The cubic root of 312739091 is about 678.7774247833. Note that the first 3 decimals are identical.

The spelling of 312739091 in words is "three hundred twelve million, seven hundred thirty-nine thousand, ninety-one".