189874159 has 2 divisors, whose sum is σ = 189874160. Its totient is φ = 189874158.

The previous prime is 189874147. The next prime is 189874169. The reversal of 189874159 is 951478981.

It is a strong prime.

It is an emirp because it is prime and its reverse (951478981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189874159 - 2¹⁷ = 189743087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189874109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94937079 + 94937080.

It is an arithmetic number, because the mean of its divisors is an integer number (94937080).

Almost surely, 2^189874159 is an apocalyptic number.

189874159 is a deficient number, since it is larger than the sum of its proper divisors (1).

189874159 is an equidigital number, since it uses as much as digits as its factorization.

189874159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 52.

The square root of 189874159 is about 13779.4832631706. The cubic root of 189874159 is about 574.7627593446.

The spelling of 189874159 in words is "one hundred eighty-nine million, eight hundred seventy-four thousand, one hundred fifty-nine".