1312311091 has 24 divisors (see below), whose sum is σ = 1663868304. Its totient is φ = 1025760960.

The previous prime is 1312311083. The next prime is 1312311097. The reversal of 1312311091 is 1901132131.

It is not a de Polignac number, because 1312311091 - 2³ = 1312311083 is a prime.

It is a super-2 number, since 2×1312311091² = 3444320799123220562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312311097) 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, 40461 + ... + 65281.

It is an arithmetic number, because the mean of its divisors is an integer number (69327846).

Almost surely, 2^1312311091 is an apocalyptic number.

1312311091 is a deficient number, since it is larger than the sum of its proper divisors (351557213).

1312311091 is a wasteful number, since it uses less digits than its factorization.

1312311091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24931 (or 24924 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1312311091 is about 36225.8345797581. The cubic root of 1312311091 is about 1094.8272535258.

The spelling of 1312311091 in words is "one billion, three hundred twelve million, three hundred eleven thousand, ninety-one".