189888169 has 2 divisors, whose sum is σ = 189888170. Its totient is φ = 189888168.

The previous prime is 189888163. The next prime is 189888173. The reversal of 189888169 is 961888981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185967769 + 3920400 = 13637^2 + 1980^2 .

It is a cyclic number.

It is not a de Polignac number, because 189888169 - 2¹⁷ = 189757097 is a prime.

It is a super-2 number, since 2×189888169² = 72115033452345122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189888163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94944084 + 94944085.

It is an arithmetic number, because the mean of its divisors is an integer number (94944085).

Almost surely, 2^189888169 is an apocalyptic number.

It is an amenable number.

189888169 is a deficient number, since it is larger than the sum of its proper divisors (1).

189888169 is an equidigital number, since it uses as much as digits as its factorization.

189888169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 58.

The square root of 189888169 is about 13779.9916182848. The cubic root of 189888169 is about 574.7768954234.

The spelling of 189888169 in words is "one hundred eighty-nine million, eight hundred eighty-eight thousand, one hundred sixty-nine".