173172885889 has 4 divisors (see below), whose sum is σ = 176857415424. Its totient is φ = 169488356356.

The previous prime is 173172885871. The next prime is 173172885947. The reversal of 173172885889 is 988588271371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 173172885889 - 2⁵ = 173172885857 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173172885829) 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, 1842264697 + ... + 1842264790.

It is an arithmetic number, because the mean of its divisors is an integer number (44214353856).

Almost surely, 2^173172885889 is an apocalyptic number.

It is an amenable number.

173172885889 is a deficient number, since it is larger than the sum of its proper divisors (3684529535).

173172885889 is an equidigital number, since it uses as much as digits as its factorization.

173172885889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684529534.

The product of its digits is 54190080, while the sum is 67.

The spelling of 173172885889 in words is "one hundred seventy-three billion, one hundred seventy-two million, eight hundred eighty-five thousand, eight hundred eighty-nine".