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13979 = 71997
BaseRepresentation
bin11011010011011
3201011202
43122123
5421404
6144415
755520
oct33233
921152
1013979
11a559
12810b
136494
145147
15421e
hex369b

13979 has 4 divisors (see below), whose sum is σ = 15984. Its totient is φ = 11976.

The previous prime is 13967. The next prime is 13997. The reversal of 13979 is 97931.

13979 is nontrivially palindromic in base 8.

13979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13979 - 24 = 13963 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (13999) 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, 992 + ... + 1005.

It is an arithmetic number, because the mean of its divisors is an integer number (3996).

213979 is an apocalyptic number.

13979 is a deficient number, since it is larger than the sum of its proper divisors (2005).

13979 is an equidigital number, since it uses as much as digits as its factorization.

13979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004.

The product of its digits is 1701, while the sum is 29.

The square root of 13979 is about 118.2328211623. The cubic root of 13979 is about 24.0893659000.

The spelling of 13979 in words is "thirteen thousand, nine hundred seventy-nine".

Divisors: 1 7 1997 13979