13899945 has 16 divisors (see below), whose sum is σ = 22288320. Its totient is φ = 7397184.

The previous prime is 13899929. The next prime is 13899947. The reversal of 13899945 is 54999831.

13899945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13899945 - 2⁴ = 13899929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13899894 and 13899903.

It is not an unprimeable number, because it can be changed into a prime (13899947) 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, 9982 + ... + 11288.

It is an arithmetic number, because the mean of its divisors is an integer number (1393020).

Almost surely, 2^13899945 is an apocalyptic number.

13899945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13899945 is a deficient number, since it is larger than the sum of its proper divisors (8388375).

13899945 is a wasteful number, since it uses less digits than its factorization.

13899945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024.

The product of its digits is 349920, while the sum is 48.

The square root of 13899945 is about 3728.2630003797. The cubic root of 13899945 is about 240.4386941535.

The spelling of 13899945 in words is "thirteen million, eight hundred ninety-nine thousand, nine hundred forty-five".