13969239 has 16 divisors (see below), whose sum is σ = 19237728. Its totient is φ = 9009792.

The previous prime is 13969217. The next prime is 13969247. The reversal of 13969239 is 93296931.

It is a happy number.

It is not a de Polignac number, because 13969239 - 2⁹ = 13968727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13969239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13969289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34989 + ... + 35385.

It is an arithmetic number, because the mean of its divisors is an integer number (1202358).

Almost surely, 2^13969239 is an apocalyptic number.

13969239 is a deficient number, since it is larger than the sum of its proper divisors (5268489).

13969239 is a wasteful number, since it uses less digits than its factorization.

13969239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754.

The product of its digits is 78732, while the sum is 42.

The square root of 13969239 is about 3737.5445147851. The cubic root of 13969239 is about 240.8375770083.

It can be divided in two parts, 139 and 69239, that added together give a triangular number (69378 = T₃₇₂).

The spelling of 13969239 in words is "thirteen million, nine hundred sixty-nine thousand, two hundred thirty-nine".