311995089 has 24 divisors (see below), whose sum is σ = 516147840. Its totient is φ = 177899328.

The previous prime is 311995049. The next prime is 311995097. The reversal of 311995089 is 980599113.

It is not a de Polignac number, because 311995089 - 2⁸ = 311994833 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311995039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25597 + ... + 35765.

It is an arithmetic number, because the mean of its divisors is an integer number (21506160).

Almost surely, 2^311995089 is an apocalyptic number.

It is an amenable number.

311995089 is a deficient number, since it is larger than the sum of its proper divisors (204152751).

311995089 is a wasteful number, since it uses less digits than its factorization.

311995089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10669 (or 10666 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 311995089 is about 17663.3827167958. The cubic root of 311995089 is about 678.2387299860.

The spelling of 311995089 in words is "three hundred eleven million, nine hundred ninety-five thousand, eighty-nine".