311117969 has 4 divisors (see below), whose sum is σ = 329419044. Its totient is φ = 292816896.

The previous prime is 311117959. The next prime is 311117977. The reversal of 311117969 is 969711113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 188018944 + 123099025 = 13712^2 + 11095^2 .

It is a cyclic number.

It is not a de Polignac number, because 311117969 - 2²⁰ = 310069393 is a prime.

It is a super-2 number, since 2×311117969² = 193588781269369922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311117909) 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 3 ways as a sum of consecutive naturals, for example, 9150512 + ... + 9150545.

It is an arithmetic number, because the mean of its divisors is an integer number (82354761).

Almost surely, 2^311117969 is an apocalyptic number.

It is an amenable number.

311117969 is a deficient number, since it is larger than the sum of its proper divisors (18301075).

311117969 is a wasteful number, since it uses less digits than its factorization.

311117969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18301074.

The product of its digits is 10206, while the sum is 38.

The square root of 311117969 is about 17638.5364755696. The cubic root of 311117969 is about 677.6025499828.

The spelling of 311117969 in words is "three hundred eleven million, one hundred seventeen thousand, nine hundred sixty-nine".