1313017939 has 4 divisors (see below), whose sum is σ = 1313535600. Its totient is φ = 1312500280.

The previous prime is 1313017879. The next prime is 1313017963. The reversal of 1313017939 is 9397103131.

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

It is a cyclic number.

It is not a de Polignac number, because 1313017939 - 2¹⁵ = 1312985171 is a prime.

It is a super-2 number, since 2×1313017939² = 3448032216271615442, 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 = 1313017898 and 1313017907.

It is not an unprimeable number, because it can be changed into a prime (1313017969) 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, 255007 + ... + 260104.

It is an arithmetic number, because the mean of its divisors is an integer number (328383900).

Almost surely, 2^1313017939 is an apocalyptic number.

1313017939 is a deficient number, since it is larger than the sum of its proper divisors (517661).

1313017939 is an equidigital number, since it uses as much as digits as its factorization.

1313017939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517660.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 1313017939 is about 36235.5893977178. The cubic root of 1313017939 is about 1095.0237865881.

The spelling of 1313017939 in words is "one billion, three hundred thirteen million, seventeen thousand, nine hundred thirty-nine".