1312889113 has 4 divisors (see below), whose sum is σ = 1381988560. Its totient is φ = 1243789668.

The previous prime is 1312889099. The next prime is 1312889119. The reversal of 1312889113 is 3119882131.

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 1312889113 - 2²¹ = 1310791961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312889119) 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, 34549695 + ... + 34549732.

It is an arithmetic number, because the mean of its divisors is an integer number (345497140).

Almost surely, 2^1312889113 is an apocalyptic number.

It is an amenable number.

1312889113 is a deficient number, since it is larger than the sum of its proper divisors (69099447).

1312889113 is an equidigital number, since it uses as much as digits as its factorization.

1312889113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69099446.

The product of its digits is 10368, while the sum is 37.

The square root of 1312889113 is about 36233.8117371054. The cubic root of 1312889113 is about 1094.9879728737.

The spelling of 1312889113 in words is "one billion, three hundred twelve million, eight hundred eighty-nine thousand, one hundred thirteen".