172866013 has 16 divisors (see below), whose sum is σ = 195471360. Its totient is φ = 152006400.

The previous prime is 172865993. The next prime is 172866017. The reversal of 172866013 is 310668271.

It is not a de Polignac number, because 172866013 - 2⁵ = 172865981 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 172866013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172866017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9628 + ... + 20938.

It is an arithmetic number, because the mean of its divisors is an integer number (12216960).

Almost surely, 2^172866013 is an apocalyptic number.

It is an amenable number.

172866013 is a deficient number, since it is larger than the sum of its proper divisors (22605347).

172866013 is a wasteful number, since it uses less digits than its factorization.

172866013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 172866013 is about 13147.8520298945. The cubic root of 172866013 is about 557.0615781341.

The spelling of 172866013 in words is "one hundred seventy-two million, eight hundred sixty-six thousand, thirteen".