189288329 has 2 divisors, whose sum is σ = 189288330. Its totient is φ = 189288328.

The previous prime is 189288301. The next prime is 189288331. The reversal of 189288329 is 923882981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 86062729 = 10160^2 + 9277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189288329 is a prime.

It is a super-2 number, since 2×189288329² = 71660142991224482, which contains 22 as substring.

Together with 189288331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189218329) 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, 94644164 + 94644165.

It is an arithmetic number, because the mean of its divisors is an integer number (94644165).

Almost surely, 2^189288329 is an apocalyptic number.

It is an amenable number.

189288329 is a deficient number, since it is larger than the sum of its proper divisors (1).

189288329 is an equidigital number, since it uses as much as digits as its factorization.

189288329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 189288329 is about 13758.2095128690. The cubic root of 189288329 is about 574.1710338255.

The spelling of 189288329 in words is "one hundred eighty-nine million, two hundred eighty-eight thousand, three hundred twenty-nine".