13786979 has 4 divisors (see below), whose sum is σ = 13796640. Its totient is φ = 13777320.

The previous prime is 13786973. The next prime is 13787003. The reversal of 13786979 is 97968731.

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 is a cyclic number.

It is not a de Polignac number, because 13786979 - 2⁴ = 13786963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13786973) 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, 2219 + ... + 5700.

It is an arithmetic number, because the mean of its divisors is an integer number (3449160).

Almost surely, 2^13786979 is an apocalyptic number.

13786979 is a deficient number, since it is larger than the sum of its proper divisors (9661).

13786979 is an equidigital number, since it uses as much as digits as its factorization.

13786979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9660.

The product of its digits is 571536, while the sum is 50.

The square root of 13786979 is about 3713.0821429104. The cubic root of 13786979 is about 239.7855665685.

The spelling of 13786979 in words is "thirteen million, seven hundred eighty-six thousand, nine hundred seventy-nine".