1311391159 has 12 divisors (see below), whose sum is σ = 1433832816. Its totient is φ = 1198746432.

The previous prime is 1311391139. The next prime is 1311391177. The reversal of 1311391159 is 9511931131.

It is not a de Polignac number, because 1311391159 - 2⁵ = 1311391127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311391139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20262 + ... + 55075.

It is an arithmetic number, because the mean of its divisors is an integer number (119486068).

Almost surely, 2^1311391159 is an apocalyptic number.

1311391159 is a deficient number, since it is larger than the sum of its proper divisors (122441657).

1311391159 is a wasteful number, since it uses less digits than its factorization.

1311391159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75466 (or 75453 counting only the distinct ones).

The product of its digits is 3645, while the sum is 34.

The square root of 1311391159 is about 36213.1351721996. The cubic root of 1311391159 is about 1094.5713685543.

The spelling of 1311391159 in words is "one billion, three hundred eleven million, three hundred ninety-one thousand, one hundred fifty-nine".