1317892913 has 2 divisors, whose sum is σ = 1317892914. Its totient is φ = 1317892912.

The previous prime is 1317892879. The next prime is 1317892937. The reversal of 1317892913 is 3192987131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111022224 + 206870689 = 33332^2 + 14383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317892913 - 2⁸ = 1317892657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1317892943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658946456 + 658946457.

It is an arithmetic number, because the mean of its divisors is an integer number (658946457).

Almost surely, 2^1317892913 is an apocalyptic number.

It is an amenable number.

1317892913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317892913 is an equidigital number, since it uses as much as digits as its factorization.

1317892913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 44.

The square root of 1317892913 is about 36302.7948373125. The cubic root of 1317892913 is about 1096.3773145562.

The spelling of 1317892913 in words is "one billion, three hundred seventeen million, eight hundred ninety-two thousand, nine hundred thirteen".