13989669 has 4 divisors (see below), whose sum is σ = 18652896. Its totient is φ = 9326444.

The previous prime is 13989641. The next prime is 13989709. The reversal of 13989669 is 96698931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13989669 - 2⁵ = 13989637 is a prime.

It is a super-2 number, since 2×13989669² = 391421677459122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13989869) 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, 2331609 + ... + 2331614.

It is an arithmetic number, because the mean of its divisors is an integer number (4663224).

Almost surely, 2^13989669 is an apocalyptic number.

It is an amenable number.

13989669 is a deficient number, since it is larger than the sum of its proper divisors (4663227).

13989669 is an equidigital number, since it uses as much as digits as its factorization.

13989669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663226.

The product of its digits is 629856, while the sum is 51.

The square root of 13989669 is about 3740.2765940502. The cubic root of 13989669 is about 240.9549280679.

The spelling of 13989669 in words is "thirteen million, nine hundred eighty-nine thousand, six hundred sixty-nine".