1313705739 has 4 divisors (see below), whose sum is σ = 1751607656. Its totient is φ = 875803824.

The previous prime is 1313705681. The next prime is 1313705749. The reversal of 1313705739 is 9375073131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1313705739 - 2⁹ = 1313705227 is a prime.

It is a super-2 number, since 2×1313705739² = 3451645537363072242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313705697 and 1313705706.

It is not an unprimeable number, because it can be changed into a prime (1313705749) 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, 218950954 + ... + 218950959.

It is an arithmetic number, because the mean of its divisors is an integer number (437901914).

Almost surely, 2^1313705739 is an apocalyptic number.

1313705739 is a deficient number, since it is larger than the sum of its proper divisors (437901917).

1313705739 is an equidigital number, since it uses as much as digits as its factorization.

1313705739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437901916.

The product of its (nonzero) digits is 59535, while the sum is 39.

The square root of 1313705739 is about 36245.0788245798. The cubic root of 1313705739 is about 1095.2149558192.

The spelling of 1313705739 in words is "one billion, three hundred thirteen million, seven hundred five thousand, seven hundred thirty-nine".