13869479 has 4 divisors (see below), whose sum is σ = 14936376. Its totient is φ = 12802584.

The previous prime is 13869461. The next prime is 13869481. The reversal of 13869479 is 97496831.

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-13869479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869419) 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, 533429 + ... + 533454.

It is an arithmetic number, because the mean of its divisors is an integer number (3734094).

Almost surely, 2^13869479 is an apocalyptic number.

13869479 is a deficient number, since it is larger than the sum of its proper divisors (1066897).

13869479 is a wasteful number, since it uses less digits than its factorization.

13869479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066896.

The product of its digits is 326592, while the sum is 47.

The square root of 13869479 is about 3724.1749421852. The cubic root of 13869479 is about 240.2629005660.

The spelling of 13869479 in words is "thirteen million, eight hundred sixty-nine thousand, four hundred seventy-nine".