311399427 has 4 divisors (see below), whose sum is σ = 415199240. Its totient is φ = 207599616.

The previous prime is 311399401. The next prime is 311399441. The reversal of 311399427 is 724993113.

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

It is not a de Polignac number, because 311399427 - 2⁸ = 311399171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311399027) 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, 51899902 + ... + 51899907.

It is an arithmetic number, because the mean of its divisors is an integer number (103799810).

Almost surely, 2^311399427 is an apocalyptic number.

311399427 is a deficient number, since it is larger than the sum of its proper divisors (103799813).

311399427 is a wasteful number, since it uses less digits than its factorization.

311399427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103799812.

The product of its digits is 40824, while the sum is 39.

The square root of 311399427 is about 17646.5131683288. The cubic root of 311399427 is about 677.8068231683.

The spelling of 311399427 in words is "three hundred eleven million, three hundred ninety-nine thousand, four hundred twenty-seven".