311159989 has 16 divisors (see below), whose sum is σ = 367819776. Its totient is φ = 257587200.

The previous prime is 311159987. The next prime is 311159999. The reversal of 311159989 is 989951113.

It is a cyclic number.

It is not a de Polignac number, because 311159989 - 2¹ = 311159987 is a prime.

It is a super-3 number, since 3×311159989³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

Its product of digits (87480) is a multiple of the sum of its prime divisors (2916).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311159987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137979 + ... + 140215.

It is an arithmetic number, because the mean of its divisors is an integer number (22988736).

Almost surely, 2^311159989 is an apocalyptic number.

It is an amenable number.

311159989 is a deficient number, since it is larger than the sum of its proper divisors (56659787).

311159989 is a wasteful number, since it uses less digits than its factorization.

311159989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916.

The product of its digits is 87480, while the sum is 46.

The square root of 311159989 is about 17639.7275772615. The cubic root of 311159989 is about 677.6330545719.

The spelling of 311159989 in words is "three hundred eleven million, one hundred fifty-nine thousand, nine hundred eighty-nine".