13979863 has 8 divisors (see below), whose sum is σ = 14328576. Its totient is φ = 13634400.

The previous prime is 13979857. The next prime is 13979921. The reversal of 13979863 is 36897931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13979863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13979803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9433 + ... + 10813.

It is an arithmetic number, because the mean of its divisors is an integer number (1791072).

Almost surely, 2^13979863 is an apocalyptic number.

13979863 is a deficient number, since it is larger than the sum of its proper divisors (348713).

13979863 is a wasteful number, since it uses less digits than its factorization.

13979863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625.

The product of its digits is 244944, while the sum is 46.

The square root of 13979863 is about 3738.9654986373. The cubic root of 13979863 is about 240.8986161255.

The spelling of 13979863 in words is "thirteen million, nine hundred seventy-nine thousand, eight hundred sixty-three".