1313928279 has 6 divisors (see below), whose sum is σ = 1897896416. Its totient is φ = 875952180.

The previous prime is 1313928277. The next prime is 1313928281. The reversal of 1313928279 is 9728293131.

It is an interprime number because it is at equal distance from previous prime (1313928277) and next prime (1313928281).

It is not a de Polignac number, because 1313928279 - 2¹ = 1313928277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313928277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72996007 + ... + 72996024.

Almost surely, 2^1313928279 is an apocalyptic number.

1313928279 is a deficient number, since it is larger than the sum of its proper divisors (583968137).

1313928279 is a wasteful number, since it uses less digits than its factorization.

1313928279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145992037 (or 145992034 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1313928279 is about 36248.1486285852. The cubic root of 1313928279 is about 1095.2767949784.

The spelling of 1313928279 in words is "one billion, three hundred thirteen million, nine hundred twenty-eight thousand, two hundred seventy-nine".