189315173 has 2 divisors, whose sum is σ = 189315174. Its totient is φ = 189315172.

The previous prime is 189315169. The next prime is 189315187. The reversal of 189315173 is 371513981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168948004 + 20367169 = 12998^2 + 4513^2 .

It is a cyclic number.

It is not a de Polignac number, because 189315173 - 2² = 189315169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189315143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94657586 + 94657587.

It is an arithmetic number, because the mean of its divisors is an integer number (94657587).

Almost surely, 2^189315173 is an apocalyptic number.

It is an amenable number.

189315173 is a deficient number, since it is larger than the sum of its proper divisors (1).

189315173 is an equidigital number, since it uses as much as digits as its factorization.

189315173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 38.

The square root of 189315173 is about 13759.1850412733. The cubic root of 189315173 is about 574.1981746407.

The spelling of 189315173 in words is "one hundred eighty-nine million, three hundred fifteen thousand, one hundred seventy-three".