13173887 has 6 divisors (see below), whose sum is σ = 13540968. Its totient is φ = 12816504.

The previous prime is 13173883. The next prime is 13173889. The reversal of 13173887 is 78837131.

13173887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13173887 - 2² = 13173883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13173887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13173883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3443 + ... + 6180.

It is an arithmetic number, because the mean of its divisors is an integer number (2256828).

Almost surely, 2^13173887 is an apocalyptic number.

13173887 is a deficient number, since it is larger than the sum of its proper divisors (367081).

13173887 is an frugal number, since it uses more digits than its factorization.

13173887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9697 (or 9660 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 13173887 is about 3629.5849624992. The cubic root of 13173887 is about 236.1772045999.

The spelling of 13173887 in words is "thirteen million, one hundred seventy-three thousand, eight hundred eighty-seven".