13139863 has 8 divisors (see below), whose sum is σ = 14432400. Its totient is φ = 11863680.

The previous prime is 13139851. The next prime is 13139873. The reversal of 13139863 is 36893131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13139863 - 2²¹ = 11042711 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 (13139873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370 + ... + 5647.

It is an arithmetic number, because the mean of its divisors is an integer number (1804050).

Almost surely, 2^13139863 is an apocalyptic number.

13139863 is a deficient number, since it is larger than the sum of its proper divisors (1292537).

13139863 is a wasteful number, since it uses less digits than its factorization.

13139863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177.

The product of its digits is 11664, while the sum is 34.

The square root of 13139863 is about 3624.8948950280. The cubic root of 13139863 is about 235.9737055355.

It can be divided in two parts, 13 and 139863, that added together give a square (139876 = 374²).

The spelling of 13139863 in words is "thirteen million, one hundred thirty-nine thousand, eight hundred sixty-three".