189315169 has 2 divisors, whose sum is σ = 189315170. Its totient is φ = 189315168.

The previous prime is 189315167. The next prime is 189315173. The reversal of 189315169 is 961513981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161594944 + 27720225 = 12712^2 + 5265^2 .

It is a cyclic number.

It is not a de Polignac number, because 189315169 - 2¹ = 189315167 is a prime.

It is a super-2 number, since 2×189315169² = 71680466426997122, which contains 22 as substring.

Together with 189315167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (189315167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94657584 + 94657585.

It is an arithmetic number, because the mean of its divisors is an integer number (94657585).

Almost surely, 2^189315169 is an apocalyptic number.

It is an amenable number.

189315169 is a deficient number, since it is larger than the sum of its proper divisors (1).

189315169 is an equidigital number, since it uses as much as digits as its factorization.

189315169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 43.

The square root of 189315169 is about 13759.1848959159. The cubic root of 189315169 is about 574.1981705967.

The spelling of 189315169 in words is "one hundred eighty-nine million, three hundred fifteen thousand, one hundred sixty-nine".