13989210191 has 4 divisors (see below), whose sum is σ = 15260956584. Its totient is φ = 12717463800.

The previous prime is 13989210181. The next prime is 13989210203. The reversal of 13989210191 is 19101298931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13989210191 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 (13989210181) 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, 635873180 + ... + 635873201.

It is an arithmetic number, because the mean of its divisors is an integer number (3815239146).

Almost surely, 2^13989210191 is an apocalyptic number.

13989210191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13989210191 is a deficient number, since it is larger than the sum of its proper divisors (1271746393).

13989210191 is a wasteful number, since it uses less digits than its factorization.

13989210191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271746392.

The product of its (nonzero) digits is 34992, while the sum is 44.

The spelling of 13989210191 in words is "thirteen billion, nine hundred eighty-nine million, two hundred ten thousand, one hundred ninety-one".