189423659 has 2 divisors, whose sum is σ = 189423660. Its totient is φ = 189423658.

The previous prime is 189423631. The next prime is 189423701. The reversal of 189423659 is 956324981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189423659 - 2²⁴ = 172646443 is a prime.

It is not a weakly prime, because it can be changed into another prime (189423629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94711829 + 94711830.

It is an arithmetic number, because the mean of its divisors is an integer number (94711830).

Almost surely, 2^189423659 is an apocalyptic number.

189423659 is a deficient number, since it is larger than the sum of its proper divisors (1).

189423659 is an equidigital number, since it uses as much as digits as its factorization.

189423659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 189423659 is about 13763.1267886335. The cubic root of 189423659 is about 574.3078340466.

The spelling of 189423659 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, six hundred fifty-nine".