189038173 has 4 divisors (see below), whose sum is σ = 197257248. Its totient is φ = 180819100.

The previous prime is 189038137. The next prime is 189038197. The reversal of 189038173 is 371830981.

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: 371830981 = 127 ⋅2927803.

It is a de Polignac number, because none of the positive numbers 2^k-189038173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189038273) 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, 4109503 + ... + 4109548.

It is an arithmetic number, because the mean of its divisors is an integer number (49314312).

Almost surely, 2^189038173 is an apocalyptic number.

It is an amenable number.

189038173 is a deficient number, since it is larger than the sum of its proper divisors (8219075).

189038173 is an equidigital number, since it uses as much as digits as its factorization.

189038173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8219074.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 189038173 is about 13749.1153533600. The cubic root of 189038173 is about 573.9179883801.

The spelling of 189038173 in words is "one hundred eighty-nine million, thirty-eight thousand, one hundred seventy-three".