13989407 has 2 divisors, whose sum is σ = 13989408. Its totient is φ = 13989406.

The previous prime is 13989389. The next prime is 13989421. The reversal of 13989407 is 70498931.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (70498931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13989407 - 2²² = 9795103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13989427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6994703 + 6994704.

It is an arithmetic number, because the mean of its divisors is an integer number (6994704).

Almost surely, 2^13989407 is an apocalyptic number.

13989407 is a deficient number, since it is larger than the sum of its proper divisors (1).

13989407 is an equidigital number, since it uses as much as digits as its factorization.

13989407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 13989407 is about 3740.2415697385. The cubic root of 13989407 is about 240.9534238487.

The spelling of 13989407 in words is "thirteen million, nine hundred eighty-nine thousand, four hundred seven".