172900328873 has 4 divisors (see below), whose sum is σ = 172926184020. Its totient is φ = 172874473728.

The previous prime is 172900328851. The next prime is 172900328893. The reversal of 172900328873 is 378823009271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 127400452624 + 45499876249 = 356932^2 + 213307^2 .

It is a cyclic number.

It is not a de Polignac number, because 172900328873 - 2⁸ = 172900328617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (172900328893) 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, 12917540 + ... + 12930917.

It is an arithmetic number, because the mean of its divisors is an integer number (43231546005).

Almost surely, 2^172900328873 is an apocalyptic number.

It is an amenable number.

172900328873 is a deficient number, since it is larger than the sum of its proper divisors (25855147).

172900328873 is an equidigital number, since it uses as much as digits as its factorization.

172900328873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25855146.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 172900328873 in words is "one hundred seventy-two billion, nine hundred million, three hundred twenty-eight thousand, eight hundred seventy-three".