189738217 has 8 divisors (see below), whose sum is σ = 190933416. Its totient is φ = 188547072.

The previous prime is 189738203. The next prime is 189738223. The reversal of 189738217 is 712837981.

It can be written as a sum of positive squares in 4 ways, for example, as 47389456 + 142348761 = 6884^2 + 11931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189738217 - 2⁷ = 189738089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189738917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172413 + ... + 173509.

It is an arithmetic number, because the mean of its divisors is an integer number (23866677).

Almost surely, 2^189738217 is an apocalyptic number.

It is an amenable number.

189738217 is a deficient number, since it is larger than the sum of its proper divisors (1195199).

189738217 is a wasteful number, since it uses less digits than its factorization.

189738217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027.

The product of its digits is 169344, while the sum is 46.

The square root of 189738217 is about 13774.5496115118. The cubic root of 189738217 is about 574.6255578531.

The spelling of 189738217 in words is "one hundred eighty-nine million, seven hundred thirty-eight thousand, two hundred seventeen".