13638669 has 8 divisors (see below), whose sum is σ = 19838112. Its totient is φ = 8265840.

The previous prime is 13638661. The next prime is 13638679. The reversal of 13638669 is 96683631.

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

It is not a de Polignac number, because 13638669 - 2³ = 13638661 is a prime.

It is a super-2 number, since 2×13638669² = 372026584183122, 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 13638669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638661) 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, 206614 + ... + 206679.

It is an arithmetic number, because the mean of its divisors is an integer number (2479764).

Almost surely, 2^13638669 is an apocalyptic number.

It is an amenable number.

13638669 is a deficient number, since it is larger than the sum of its proper divisors (6199443).

13638669 is a wasteful number, since it uses less digits than its factorization.

13638669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413307.

The product of its digits is 139968, while the sum is 42.

The square root of 13638669 is about 3693.0568639001. The cubic root of 13638669 is about 238.9226537295.

The spelling of 13638669 in words is "thirteen million, six hundred thirty-eight thousand, six hundred sixty-nine".