13906989939 has 4 divisors (see below), whose sum is σ = 18542653256. Its totient is φ = 9271326624.

The previous prime is 13906989937. The next prime is 13906990001. The reversal of 13906989939 is 93998960931.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13906989939 - 2¹ = 13906989937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13906989939.

It is not an unprimeable number, because it can be changed into a prime (13906989937) 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, 2317831654 + ... + 2317831659.

It is an arithmetic number, because the mean of its divisors is an integer number (4635663314).

Almost surely, 2^13906989939 is an apocalyptic number.

13906989939 is a deficient number, since it is larger than the sum of its proper divisors (4635663317).

13906989939 is an equidigital number, since it uses as much as digits as its factorization.

13906989939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635663316.

The product of its (nonzero) digits is 25509168, while the sum is 66.

The spelling of 13906989939 in words is "thirteen billion, nine hundred six million, nine hundred eighty-nine thousand, nine hundred thirty-nine".