1379637513 has 12 divisors (see below), whose sum is σ = 1993162548. Its totient is φ = 919595520.

The previous prime is 1379637509. The next prime is 1379637521. The reversal of 1379637513 is 3157369731.

1379637513 is a `hidden beast` number, since 1 + 3 + 7 + 9 + 637 + 5 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1020610809 + 359026704 = 31947^2 + 18948^2 .

It is not a de Polignac number, because 1379637513 - 2² = 1379637509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1379637583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62593 + ... + 81713.

It is an arithmetic number, because the mean of its divisors is an integer number (166096879).

Almost surely, 2^1379637513 is an apocalyptic number.

It is an amenable number.

1379637513 is a deficient number, since it is larger than the sum of its proper divisors (613525035).

1379637513 is a wasteful number, since it uses less digits than its factorization.

1379637513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27144 (or 27141 counting only the distinct ones).

The product of its digits is 357210, while the sum is 45.

The square root of 1379637513 is about 37143.4720105700. The cubic root of 1379637513 is about 1113.2387923255.

The spelling of 1379637513 in words is "one billion, three hundred seventy-nine million, six hundred thirty-seven thousand, five hundred thirteen".