311921379 has 24 divisors (see below), whose sum is σ = 561729792. Its totient is φ = 162036720.

The previous prime is 311921369. The next prime is 311921413. The reversal of 311921379 is 973129113.

It is a happy number.

It is not a de Polignac number, because 311921379 - 2¹³ = 311913187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311921339) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224359 + ... + 225744.

It is an arithmetic number, because the mean of its divisors is an integer number (23405408).

Almost surely, 2^311921379 is an apocalyptic number.

311921379 is a deficient number, since it is larger than the sum of its proper divisors (249808413).

311921379 is a wasteful number, since it uses less digits than its factorization.

311921379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450127 (or 450124 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 311921379 is about 17661.2960736182. The cubic root of 311921379 is about 678.1853136385.

The spelling of 311921379 in words is "three hundred eleven million, nine hundred twenty-one thousand, three hundred seventy-nine".