13989907 has 2 divisors, whose sum is σ = 13989908. Its totient is φ = 13989906.

The previous prime is 13989869. The next prime is 13989917. The reversal of 13989907 is 70998931.

13989907 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13989907 - 2¹⁹ = 13465619 is a prime.

It is not a weakly prime, because it can be changed into another prime (13989917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994953 + 6994954.

It is an arithmetic number, because the mean of its divisors is an integer number (6994954).

Almost surely, 2^13989907 is an apocalyptic number.

13989907 is a deficient number, since it is larger than the sum of its proper divisors (1).

13989907 is an equidigital number, since it uses as much as digits as its factorization.

13989907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 13989907 is about 3740.3084097438. The cubic root of 13989907 is about 240.9562944797.

The spelling of 13989907 in words is "thirteen million, nine hundred eighty-nine thousand, nine hundred seven".