13979263 has 4 divisors (see below), whose sum is σ = 14115088. Its totient is φ = 13843440.

The previous prime is 13979249. The next prime is 13979279. The reversal of 13979263 is 36297931.

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 13979263 - 2⁹ = 13978751 is a prime.

It is a super-3 number, since 3×13979263³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13979213) 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, 67758 + ... + 67963.

It is an arithmetic number, because the mean of its divisors is an integer number (3528772).

Almost surely, 2^13979263 is an apocalyptic number.

13979263 is a deficient number, since it is larger than the sum of its proper divisors (135825).

13979263 is a wasteful number, since it uses less digits than its factorization.

13979263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135824.

The product of its digits is 61236, while the sum is 40.

The square root of 13979263 is about 3738.8852616789. The cubic root of 13979263 is about 240.8951697103.

The spelling of 13979263 in words is "thirteen million, nine hundred seventy-nine thousand, two hundred sixty-three".