1312302091 has 4 divisors (see below), whose sum is σ = 1325042992. Its totient is φ = 1299561192.

The previous prime is 1312302067. The next prime is 1312302139. The reversal of 1312302091 is 1902032131.

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 1312302091 - 2¹⁷ = 1312171019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312302011) 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, 6370296 + ... + 6370501.

It is an arithmetic number, because the mean of its divisors is an integer number (331260748).

Almost surely, 2^1312302091 is an apocalyptic number.

1312302091 is a deficient number, since it is larger than the sum of its proper divisors (12740901).

1312302091 is a wasteful number, since it uses less digits than its factorization.

1312302091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12740900.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1312302091 is about 36225.7103588046. The cubic root of 1312302091 is about 1094.8247506976.

The spelling of 1312302091 in words is "one billion, three hundred twelve million, three hundred two thousand, ninety-one".