1513317691 has 2 divisors, whose sum is σ = 1513317692. Its totient is φ = 1513317690.

The previous prime is 1513317653. The next prime is 1513317721. The reversal of 1513317691 is 1967133151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1513317691 - 2⁷ = 1513317563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1513317691.

It is not a weakly prime, because it can be changed into another prime (1513315691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756658845 + 756658846.

It is an arithmetic number, because the mean of its divisors is an integer number (756658846).

Almost surely, 2^1513317691 is an apocalyptic number.

1513317691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513317691 is an equidigital number, since it uses as much as digits as its factorization.

1513317691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 1513317691 is about 38901.3841784582. The cubic root of 1513317691 is about 1148.0920324567.

The spelling of 1513317691 in words is "one billion, five hundred thirteen million, three hundred seventeen thousand, six hundred ninety-one".