1315700991 has 24 divisors (see below), whose sum is σ = 2112351696. Its totient is φ = 782346240.

The previous prime is 1315700987. The next prime is 1315701001. The reversal of 1315700991 is 1990075131.

It is not a de Polignac number, because 1315700991 - 2² = 1315700987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315700921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120130 + ... + 130623.

It is an arithmetic number, because the mean of its divisors is an integer number (88014654).

Almost surely, 2^1315700991 is an apocalyptic number.

1315700991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1315700991 is a deficient number, since it is larger than the sum of its proper divisors (796650705).

1315700991 is a wasteful number, since it uses less digits than its factorization.

1315700991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250823 (or 250820 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 36.

The square root of 1315700991 is about 36272.5928353626. The cubic root of 1315700991 is about 1095.7691449835.

The spelling of 1315700991 in words is "one billion, three hundred fifteen million, seven hundred thousand, nine hundred ninety-one".