13979289 has 4 divisors (see below), whose sum is σ = 18639056. Its totient is φ = 9319524.

The previous prime is 13979279. The next prime is 13979291. The reversal of 13979289 is 98297931.

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 not a de Polignac number, because 13979289 - 2⁸ = 13979033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13979209) 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 3 ways as a sum of consecutive naturals, for example, 2329879 + ... + 2329884.

It is an arithmetic number, because the mean of its divisors is an integer number (4659764).

Almost surely, 2^13979289 is an apocalyptic number.

It is an amenable number.

13979289 is a deficient number, since it is larger than the sum of its proper divisors (4659767).

13979289 is an equidigital number, since it uses as much as digits as its factorization.

13979289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4659766.

The product of its digits is 244944, while the sum is 48.

The square root of 13979289 is about 3738.8887386495. Note that the first 3 decimals coincide. The cubic root of 13979289 is about 240.8953190570.

The spelling of 13979289 in words is "thirteen million, nine hundred seventy-nine thousand, two hundred eighty-nine".