13979894 has 4 divisors (see below), whose sum is σ = 20969844. Its totient is φ = 6989946.

The previous prime is 13979857. The next prime is 13979921. The reversal of 13979894 is 49897931.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3494972 + ... + 3494975.

It is an arithmetic number, because the mean of its divisors is an integer number (5242461).

Almost surely, 2^13979894 is an apocalyptic number.

13979894 is a deficient number, since it is larger than the sum of its proper divisors (6989950).

13979894 is an equidigital number, since it uses as much as digits as its factorization.

13979894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989949.

The product of its digits is 489888, while the sum is 50.

The square root of 13979894 is about 3738.9696441667. The cubic root of 13979894 is about 240.8987941876.

The spelling of 13979894 in words is "thirteen million, nine hundred seventy-nine thousand, eight hundred ninety-four".