311998473 has 20 divisors (see below), whose sum is σ = 486338688. Its totient is φ = 198954360.

The previous prime is 311998471. The next prime is 311998499. The reversal of 311998473 is 374899113.

It is not a de Polignac number, because 311998473 - 2¹ = 311998471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311998471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 81873 + ... + 85598.

Almost surely, 2^311998473 is an apocalyptic number.

It is an amenable number.

311998473 is a deficient number, since it is larger than the sum of its proper divisors (174340215).

311998473 is a wasteful number, since it uses less digits than its factorization.

311998473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167506 (or 167497 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 311998473 is about 17663.4785079270. The cubic root of 311998473 is about 678.2411821096.

The spelling of 311998473 in words is "three hundred eleven million, nine hundred ninety-eight thousand, four hundred seventy-three".