13979990 has 8 divisors (see below), whose sum is σ = 25164000. Its totient is φ = 5591992.

The previous prime is 13979983. The next prime is 13980047. The reversal of 13979990 is 9997931.

It is a happy number.

13979990 is digitally balanced in base 2, 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698990 + ... + 699009.

It is an arithmetic number, because the mean of its divisors is an integer number (3145500).

Almost surely, 2^13979990 is an apocalyptic number.

13979990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13979990 is a deficient number, since it is larger than the sum of its proper divisors (11184010).

13979990 is a wasteful number, since it uses less digits than its factorization.

13979990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398006.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 13979990 is about 3738.9824819060. The cubic root of 13979990 is about 240.8993456040.

The spelling of 13979990 in words is "thirteen million, nine hundred seventy-nine thousand, nine hundred ninety".