189900023 has 2 divisors, whose sum is σ = 189900024. Its totient is φ = 189900022.

The previous prime is 189900001. The next prime is 189900097. The reversal of 189900023 is 320009981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189900023 - 2⁶ = 189899959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189900223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94950011 + 94950012.

It is an arithmetic number, because the mean of its divisors is an integer number (94950012).

Almost surely, 2^189900023 is an apocalyptic number.

189900023 is a deficient number, since it is larger than the sum of its proper divisors (1).

189900023 is an equidigital number, since it uses as much as digits as its factorization.

189900023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 189900023 is about 13780.4217279443. The cubic root of 189900023 is about 574.7888555569.

The spelling of 189900023 in words is "one hundred eighty-nine million, nine hundred thousand, twenty-three".