1313459691 has 4 divisors (see below), whose sum is σ = 1751279592. Its totient is φ = 875639792.

The previous prime is 1313459687. The next prime is 1313459699. The reversal of 1313459691 is 1969543131.

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 1313459691 - 2² = 1313459687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1313459699) 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, 218909946 + ... + 218909951.

It is an arithmetic number, because the mean of its divisors is an integer number (437819898).

Almost surely, 2^1313459691 is an apocalyptic number.

1313459691 is a deficient number, since it is larger than the sum of its proper divisors (437819901).

1313459691 is an equidigital number, since it uses as much as digits as its factorization.

1313459691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437819900.

The product of its digits is 87480, while the sum is 42.

The square root of 1313459691 is about 36241.6844393304. The cubic root of 1313459691 is about 1095.1465761542.

The spelling of 1313459691 in words is "one billion, three hundred thirteen million, four hundred fifty-nine thousand, six hundred ninety-one".