13177989 has 18 divisors (see below), whose sum is σ = 20924358. Its totient is φ = 7986000.

The previous prime is 13177961. The next prime is 13177999. The reversal of 13177989 is 98977131.

13177989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 13176900 + 1089 = 3630^2 + 33^2 .

It is not a de Polignac number, because 13177989 - 2⁹ = 13177477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13177999) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4962 + ... + 7139.

Almost surely, 2^13177989 is an apocalyptic number.

It is an amenable number.

13177989 is a deficient number, since it is larger than the sum of its proper divisors (7746369).

13177989 is a wasteful number, since it uses less digits than its factorization.

13177989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129 (or 12115 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 13177989 is about 3630.1499969010. The cubic root of 13177989 is about 236.2017151679.

The spelling of 13177989 in words is "thirteen million, one hundred seventy-seven thousand, nine hundred eighty-nine".