189849173 has 2 divisors, whose sum is σ = 189849174. Its totient is φ = 189849172.

The previous prime is 189849161. The next prime is 189849223. The reversal of 189849173 is 371948981.

It is an a-pointer prime, because the next prime (189849223) can be obtained adding 189849173 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141086884 + 48762289 = 11878^2 + 6983^2 .

It is a cyclic number.

It is not a de Polignac number, because 189849173 - 2¹⁰ = 189848149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189849113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94924586 + 94924587.

It is an arithmetic number, because the mean of its divisors is an integer number (94924587).

Almost surely, 2^189849173 is an apocalyptic number.

It is an amenable number.

189849173 is a deficient number, since it is larger than the sum of its proper divisors (1).

189849173 is an equidigital number, since it uses as much as digits as its factorization.

189849173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 189849173 is about 13778.5765955704. The cubic root of 189849173 is about 574.7375467646.

The spelling of 189849173 in words is "one hundred eighty-nine million, eight hundred forty-nine thousand, one hundred seventy-three".