1379719613 has 4 divisors (see below), whose sum is σ = 1379811228. Its totient is φ = 1379628000.

The previous prime is 1379719589. The next prime is 1379719619. The reversal of 1379719613 is 3169179731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 642216964 + 737502649 = 25342^2 + 27157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379719613 - 2¹² = 1379715517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379719619) 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, 17306 + ... + 55307.

It is an arithmetic number, because the mean of its divisors is an integer number (344952807).

Almost surely, 2^1379719613 is an apocalyptic number.

It is an amenable number.

1379719613 is a deficient number, since it is larger than the sum of its proper divisors (91615).

1379719613 is an equidigital number, since it uses as much as digits as its factorization.

1379719613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91614.

The product of its digits is 214326, while the sum is 47.

The square root of 1379719613 is about 37144.5771681412. The cubic root of 1379719613 is about 1113.2608742349.

The spelling of 1379719613 in words is "one billion, three hundred seventy-nine million, seven hundred nineteen thousand, six hundred thirteen".