1311513329 has 4 divisors (see below), whose sum is σ = 1498872384. Its totient is φ = 1124154276.

The previous prime is 1311513319. The next prime is 1311513353. The reversal of 1311513329 is 9233151131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1311513329 - 2¹² = 1311509233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311513319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93679517 + ... + 93679530.

It is an arithmetic number, because the mean of its divisors is an integer number (374718096).

Almost surely, 2^1311513329 is an apocalyptic number.

It is an amenable number.

1311513329 is a deficient number, since it is larger than the sum of its proper divisors (187359055).

1311513329 is an equidigital number, since it uses as much as digits as its factorization.

1311513329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187359054.

The product of its digits is 2430, while the sum is 29.

The square root of 1311513329 is about 36214.8219517921. The cubic root of 1311513329 is about 1094.6053578109.

The spelling of 1311513329 in words is "one billion, three hundred eleven million, five hundred thirteen thousand, three hundred twenty-nine".