173572397123 has 4 divisors (see below), whose sum is σ = 173617333008. Its totient is φ = 173527461240.

The previous prime is 173572397111. The next prime is 173572397171. The reversal of 173572397123 is 321793275371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321793275371 = 103 ⋅3124206557.

It is a cyclic number.

It is not a de Polignac number, because 173572397123 - 2²⁴ = 173555619907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173572399123) 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, 22462148 + ... + 22469873.

It is an arithmetic number, because the mean of its divisors is an integer number (43404333252).

Almost surely, 2^173572397123 is an apocalyptic number.

173572397123 is a deficient number, since it is larger than the sum of its proper divisors (44935885).

173572397123 is an equidigital number, since it uses as much as digits as its factorization.

173572397123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44935884.

The product of its digits is 1666980, while the sum is 50.

The spelling of 173572397123 in words is "one hundred seventy-three billion, five hundred seventy-two million, three hundred ninety-seven thousand, one hundred twenty-three".