1313920739 has 2 divisors, whose sum is σ = 1313920740. Its totient is φ = 1313920738.

The previous prime is 1313920733. The next prime is 1313920753. The reversal of 1313920739 is 9370293131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313920739 is a prime.

It is a super-2 number, since 2×1313920739² = 3452775416748612242, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1313920733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656960369 + 656960370.

It is an arithmetic number, because the mean of its divisors is an integer number (656960370).

Almost surely, 2^1313920739 is an apocalyptic number.

1313920739 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313920739 is an equidigital number, since it uses as much as digits as its factorization.

1313920739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 1313920739 is about 36248.0446231242. The cubic root of 1313920739 is about 1095.2746998862.

The spelling of 1313920739 in words is "one billion, three hundred thirteen million, nine hundred twenty thousand, seven hundred thirty-nine".