13791979 has 8 divisors (see below), whose sum is σ = 14026608. Its totient is φ = 13559520.

The previous prime is 13791977. The next prime is 13792001. The reversal of 13791979 is 97919731.

13791979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13791979 - 2¹ = 13791977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13791971) 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, 16389 + ... + 17209.

It is an arithmetic number, because the mean of its divisors is an integer number (1753326).

Almost surely, 2^13791979 is an apocalyptic number.

13791979 is a deficient number, since it is larger than the sum of its proper divisors (234629).

13791979 is a wasteful number, since it uses less digits than its factorization.

13791979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085.

The product of its digits is 107163, while the sum is 46.

The square root of 13791979 is about 3713.7553769736. The cubic root of 13791979 is about 239.8145500252.

The spelling of 13791979 in words is "thirteen million, seven hundred ninety-one thousand, nine hundred seventy-nine".