312271393 has 4 divisors (see below), whose sum is σ = 356881600. Its totient is φ = 267661188.

The previous prime is 312271387. The next prime is 312271409. The reversal of 312271393 is 393172213.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312271393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312271313) 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, 22305093 + ... + 22305106.

It is an arithmetic number, because the mean of its divisors is an integer number (89220400).

Almost surely, 2^312271393 is an apocalyptic number.

It is an amenable number.

312271393 is a deficient number, since it is larger than the sum of its proper divisors (44610207).

312271393 is an equidigital number, since it uses as much as digits as its factorization.

312271393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44610206.

The product of its digits is 6804, while the sum is 31.

The square root of 312271393 is about 17671.2023642988. The cubic root of 312271393 is about 678.4388878166.

The spelling of 312271393 in words is "three hundred twelve million, two hundred seventy-one thousand, three hundred ninety-three".