13239969 has 16 divisors (see below), whose sum is σ = 18258240. Its totient is φ = 8527680.

The previous prime is 13239949. The next prime is 13239997. The reversal of 13239969 is 96993231.

It is a happy number.

It is not a de Polignac number, because 13239969 - 2¹⁶ = 13174433 is a prime.

It is a super-2 number, since 2×13239969² = 350593558241922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13239969.

It is not an unprimeable number, because it can be changed into a prime (13239949) 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, 19762 + ... + 20420.

It is an arithmetic number, because the mean of its divisors is an integer number (1141140).

Almost surely, 2^13239969 is an apocalyptic number.

It is an amenable number.

13239969 is a deficient number, since it is larger than the sum of its proper divisors (5018271).

13239969 is a wasteful number, since it uses less digits than its factorization.

13239969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880.

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

The square root of 13239969 is about 3638.6768199443. The cubic root of 13239969 is about 236.5714450850.

The spelling of 13239969 in words is "thirteen million, two hundred thirty-nine thousand, nine hundred sixty-nine".