1315992613 has 8 divisors (see below), whose sum is σ = 1418375000. Its totient is φ = 1213774848.

The previous prime is 1315992607. The next prime is 1315992617. The reversal of 1315992613 is 3162995131.

It can be written as a sum of positive squares in 4 ways, for example, as 7144929 + 1308847684 = 2673^2 + 36178^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1315992613 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 (1315992617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24288 + ... + 56761.

It is an arithmetic number, because the mean of its divisors is an integer number (177296875).

Almost surely, 2^1315992613 is an apocalyptic number.

1315992613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1315992613 is a deficient number, since it is larger than the sum of its proper divisors (102382387).

1315992613 is a wasteful number, since it uses less digits than its factorization.

1315992613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82311.

The product of its digits is 43740, while the sum is 40.

The square root of 1315992613 is about 36276.6124796679. The cubic root of 1315992613 is about 1095.8500972124.

The spelling of 1315992613 in words is "one billion, three hundred fifteen million, nine hundred ninety-two thousand, six hundred thirteen".