1312331199 has 4 divisors (see below), whose sum is σ = 1749774936. Its totient is φ = 874887464.

The previous prime is 1312331183. The next prime is 1312331213. The reversal of 1312331199 is 9911332131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312331199 - 2⁴ = 1312331183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312331299) 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, 218721864 + ... + 218721869.

It is an arithmetic number, because the mean of its divisors is an integer number (437443734).

Almost surely, 2^1312331199 is an apocalyptic number.

1312331199 is a deficient number, since it is larger than the sum of its proper divisors (437443737).

1312331199 is an equidigital number, since it uses as much as digits as its factorization.

1312331199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437443736.

The product of its digits is 4374, while the sum is 33.

The square root of 1312331199 is about 36226.1121154341. The cubic root of 1312331199 is about 1094.8328453590.

The spelling of 1312331199 in words is "one billion, three hundred twelve million, three hundred thirty-one thousand, one hundred ninety-nine".