1313278039 has 4 divisors (see below), whose sum is σ = 1313596624. Its totient is φ = 1312959456.

The previous prime is 1313278003. The next prime is 1313278051. The reversal of 1313278039 is 9308723131.

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 1313278039 - 2⁹ = 1313277527 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313277989 and 1313278007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313278639) 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, 153027 + ... + 161380.

It is an arithmetic number, because the mean of its divisors is an integer number (328399156).

Almost surely, 2^1313278039 is an apocalyptic number.

1313278039 is a deficient number, since it is larger than the sum of its proper divisors (318585).

1313278039 is an equidigital number, since it uses as much as digits as its factorization.

1313278039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318584.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 1313278039 is about 36239.1782329567. The cubic root of 1313278039 is about 1095.0960874236.

The spelling of 1313278039 in words is "one billion, three hundred thirteen million, two hundred seventy-eight thousand, thirty-nine".