13989969 has 16 divisors (see below), whose sum is σ = 23687040. Its totient is φ = 7994160.

The previous prime is 13989953. The next prime is 13990001. The reversal of 13989969 is 96998931.

13989969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13989969 - 2⁴ = 13989953 is a prime.

It is a super-2 number, since 2×13989969² = 391438465241922, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 36822 + ... + 37199.

It is an arithmetic number, because the mean of its divisors is an integer number (1480440).

Almost surely, 2^13989969 is an apocalyptic number.

It is an amenable number.

13989969 is a deficient number, since it is larger than the sum of its proper divisors (9697071).

13989969 is an equidigital number, since it uses as much as digits as its factorization.

13989969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74037 (or 74031 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 13989969 is about 3740.3166978212. The cubic root of 13989969 is about 240.9566504332.

The spelling of 13989969 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred sixty-nine".