13979697 has 4 divisors (see below), whose sum is σ = 18639600. Its totient is φ = 9319796.

The previous prime is 13979689. The next prime is 13979717. The reversal of 13979697 is 79697931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13979697 - 2³ = 13979689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13979677) 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, 2329947 + ... + 2329952.

It is an arithmetic number, because the mean of its divisors is an integer number (4659900).

Almost surely, 2^13979697 is an apocalyptic number.

It is an amenable number.

13979697 is a deficient number, since it is larger than the sum of its proper divisors (4659903).

13979697 is an equidigital number, since it uses as much as digits as its factorization.

13979697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659902.

The product of its digits is 642978, while the sum is 51.

The square root of 13979697 is about 3738.9432999178. The cubic root of 13979697 is about 240.8976626271.

The spelling of 13979697 in words is "thirteen million, nine hundred seventy-nine thousand, six hundred ninety-seven".