189283889 has 2 divisors, whose sum is σ = 189283890. Its totient is φ = 189283888.

The previous prime is 189283883. The next prime is 189283903. The reversal of 189283889 is 988382981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134745664 + 54538225 = 11608^2 + 7385^2 .

It is a cyclic number.

It is not a de Polignac number, because 189283889 - 2⁴ = 189283873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (189283883) 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, 94641944 + 94641945.

It is an arithmetic number, because the mean of its divisors is an integer number (94641945).

Almost surely, 2^189283889 is an apocalyptic number.

It is an amenable number.

189283889 is a deficient number, since it is larger than the sum of its proper divisors (1).

189283889 is an equidigital number, since it uses as much as digits as its factorization.

189283889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1990656, while the sum is 56.

The square root of 189283889 is about 13758.0481537172. The cubic root of 189283889 is about 574.1665444849.

The spelling of 189283889 in words is "one hundred eighty-nine million, two hundred eighty-three thousand, eight hundred eighty-nine".