13956789 has 32 divisors (see below), whose sum is σ = 23961600. Its totient is φ = 7012800.

The previous prime is 13956763. The next prime is 13956793. The reversal of 13956789 is 98765931.

It is not a de Polignac number, because 13956789 - 2⁵ = 13956757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13956799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6187 + ... + 8135.

It is an arithmetic number, because the mean of its divisors is an integer number (748800).

Almost surely, 2^13956789 is an apocalyptic number.

It is an amenable number.

13956789 is a deficient number, since it is larger than the sum of its proper divisors (10004811).

13956789 is a wasteful number, since it uses less digits than its factorization.

13956789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001.

The product of its digits is 408240, while the sum is 48.

The square root of 13956789 is about 3735.8786115183. The cubic root of 13956789 is about 240.7660073961.

It can be divided in two parts, 139567 and 89, that added together give a triangular number (139656 = T₅₂₈).

The spelling of 13956789 in words is "thirteen million, nine hundred fifty-six thousand, seven hundred eighty-nine".