189172516 has 45 divisors (see below), whose sum is σ = 374770641. Its totient is φ = 83514288.

The previous prime is 189172513. The next prime is 189172517. The reversal of 189172516 is 615271981.

It is a happy number.

The square root of 189172516 is 13754.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 161188416 = 5290^2 + 12696^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189172513) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 8224881 + ... + 8224903.

Almost surely, 2^189172516 is an apocalyptic number.

189172516 is the 13754-th square number.

It is an amenable number.

189172516 is a deficient number, since it is larger than the sum of its proper divisors (185598125).

189172516 is an frugal number, since it uses more digits than its factorization.

189172516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 38 counting only the distinct ones).

The product of its digits is 30240, while the sum is 40.

The cubic root of 189172516 is about 574.0539108514.

The spelling of 189172516 in words is "one hundred eighty-nine million, one hundred seventy-two thousand, five hundred sixteen".