13891789 has 4 divisors (see below), whose sum is σ = 14087520. Its totient is φ = 13696060.

The previous prime is 13891781. The next prime is 13891807. The reversal of 13891789 is 98719831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98719831 = 7 ⋅14102833.

It is a cyclic number.

It is not a de Polignac number, because 13891789 - 2³ = 13891781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13891781) 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, 97759 + ... + 97900.

It is an arithmetic number, because the mean of its divisors is an integer number (3521880).

Almost surely, 2^13891789 is an apocalyptic number.

It is an amenable number.

13891789 is a deficient number, since it is larger than the sum of its proper divisors (195731).

13891789 is an equidigital number, since it uses as much as digits as its factorization.

13891789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195730.

The product of its digits is 108864, while the sum is 46.

The square root of 13891789 is about 3727.1690329257. The cubic root of 13891789 is about 240.3916579562.

The spelling of 13891789 in words is "thirteen million, eight hundred ninety-one thousand, seven hundred eighty-nine".