13869959 has 4 divisors (see below), whose sum is σ = 13992816. Its totient is φ = 13747104.

The previous prime is 13869949. The next prime is 13869967. The reversal of 13869959 is 95996831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13869959 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 (13869949) 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, 61259 + ... + 61484.

It is an arithmetic number, because the mean of its divisors is an integer number (3498204).

Almost surely, 2^13869959 is an apocalyptic number.

13869959 is a deficient number, since it is larger than the sum of its proper divisors (122857).

13869959 is a wasteful number, since it uses less digits than its factorization.

13869959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122856.

The product of its digits is 524880, while the sum is 50.

The square root of 13869959 is about 3724.2393854316. The cubic root of 13869959 is about 240.2656722361.

The spelling of 13869959 in words is "thirteen million, eight hundred sixty-nine thousand, nine hundred fifty-nine".