13906989 has 12 divisors (see below), whose sum is σ = 20388576. Its totient is φ = 9132552.

The previous prime is 13906943. The next prime is 13906999. The reversal of 13906989 is 98960931.

It is not a de Polignac number, because 13906989 - 2⁷ = 13906861 is a prime.

It is a super-2 number, since 2×13906989² = 386808686092242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13906909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10929 + ... + 12134.

It is an arithmetic number, because the mean of its divisors is an integer number (1699048).

Almost surely, 2^13906989 is an apocalyptic number.

It is an amenable number.

13906989 is a deficient number, since it is larger than the sum of its proper divisors (6481587).

13906989 is a wasteful number, since it uses less digits than its factorization.

13906989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23136 (or 23133 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 13906989 is about 3729.2075565728. The cubic root of 13906989 is about 240.4793025672.

The spelling of 13906989 in words is "thirteen million, nine hundred six thousand, nine hundred eighty-nine".