1313831091 has 16 divisors (see below), whose sum is σ = 1794240000. Its totient is φ = 854763168.

The previous prime is 1313831087. The next prime is 1313831149. The reversal of 1313831091 is 1901383131.

It is a happy number.

It is not a de Polignac number, because 1313831091 - 2² = 1313831087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313831011) 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, 35860 + ... + 62558.

It is an arithmetic number, because the mean of its divisors is an integer number (112140000).

Almost surely, 2^1313831091 is an apocalyptic number.

1313831091 is a deficient number, since it is larger than the sum of its proper divisors (480408909).

1313831091 is a wasteful number, since it uses less digits than its factorization.

1313831091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27098.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1313831091 is about 36246.8080111891. The cubic root of 1313831091 is about 1095.2497893477.

The spelling of 1313831091 in words is "one billion, three hundred thirteen million, eight hundred thirty-one thousand, ninety-one".