172773123 has 4 divisors (see below), whose sum is σ = 230364168. Its totient is φ = 115182080.

The previous prime is 172773113. The next prime is 172773151. The reversal of 172773123 is 321377271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321377271 = 3 ⋅107125757.

It is a cyclic number.

It is not a de Polignac number, because 172773123 - 2¹⁰ = 172772099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172773113) 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, 28795518 + ... + 28795523.

It is an arithmetic number, because the mean of its divisors is an integer number (57591042).

Almost surely, 2^172773123 is an apocalyptic number.

172773123 is a deficient number, since it is larger than the sum of its proper divisors (57591045).

172773123 is an equidigital number, since it uses as much as digits as its factorization.

172773123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57591044.

The product of its digits is 12348, while the sum is 33.

The square root of 172773123 is about 13144.3190390374. The cubic root of 172773123 is about 556.9617807623.

The spelling of 172773123 in words is "one hundred seventy-two million, seven hundred seventy-three thousand, one hundred twenty-three".