1311877969 has 4 divisors (see below), whose sum is σ = 1321316080. Its totient is φ = 1302439860.

The previous prime is 1311877951. The next prime is 1311877999. The reversal of 1311877969 is 9697781131.

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 a cyclic number.

It is not a de Polignac number, because 1311877969 - 2²⁵ = 1278323537 is a prime.

It is a super-2 number, since 2×1311877969² = 3442047611095129922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311877909) 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, 4718847 + ... + 4719124.

It is an arithmetic number, because the mean of its divisors is an integer number (330329020).

Almost surely, 2^1311877969 is an apocalyptic number.

It is an amenable number.

1311877969 is a deficient number, since it is larger than the sum of its proper divisors (9438111).

1311877969 is an equidigital number, since it uses as much as digits as its factorization.

1311877969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9438110.

The product of its digits is 571536, while the sum is 52.

The square root of 1311877969 is about 36219.8560046834. The cubic root of 1311877969 is about 1094.7067927725.

The spelling of 1311877969 in words is "one billion, three hundred eleven million, eight hundred seventy-seven thousand, nine hundred sixty-nine".