13171986 has 48 divisors (see below), whose sum is σ = 29577600. Its totient is φ = 4234464.

The previous prime is 13171973. The next prime is 13171987. The reversal of 13171986 is 68917131.

13171986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13171986.

It is not an unprimeable number, because it can be changed into a prime (13171987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83820 + ... + 83976.

It is an arithmetic number, because the mean of its divisors is an integer number (616200).

Almost surely, 2^13171986 is an apocalyptic number.

13171986 is an abundant number, since it is smaller than the sum of its proper divisors (16405614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13171986 is a wasteful number, since it uses less digits than its factorization.

13171986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 300 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 13171986 is about 3629.3230773796. The cubic root of 13171986 is about 236.1658438815.

The spelling of 13171986 in words is "thirteen million, one hundred seventy-one thousand, nine hundred eighty-six".