172112873 has 4 divisors (see below), whose sum is σ = 172212480. Its totient is φ = 172013268.

The previous prime is 172112861. The next prime is 172112881. The reversal of 172112873 is 378211271.

172112873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 378211271 = 2971 ⋅127301.

It is a cyclic number.

It is not a de Polignac number, because 172112873 - 2¹⁴ = 172096489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172112833) 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, 47165 + ... + 50682.

It is an arithmetic number, because the mean of its divisors is an integer number (43053120).

Almost surely, 2^172112873 is an apocalyptic number.

It is an amenable number.

172112873 is a deficient number, since it is larger than the sum of its proper divisors (99607).

172112873 is an equidigital number, since it uses as much as digits as its factorization.

172112873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99606.

The product of its digits is 4704, while the sum is 32.

The square root of 172112873 is about 13119.1795856296. The cubic root of 172112873 is about 556.2514012842.

The spelling of 172112873 in words is "one hundred seventy-two million, one hundred twelve thousand, eight hundred seventy-three".