189900027 has 6 divisors (see below), whose sum is σ = 274300052. Its totient is φ = 126600012.

The previous prime is 189900023. The next prime is 189900097. The reversal of 189900027 is 720009981.

It is a happy number.

It is not a de Polignac number, because 189900027 - 2² = 189900023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189899964 and 189900000.

It is not an unprimeable number, because it can be changed into a prime (189900023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10549993 + ... + 10550010.

Almost surely, 2^189900027 is an apocalyptic number.

189900027 is a deficient number, since it is larger than the sum of its proper divisors (84400025).

189900027 is a wasteful number, since it uses less digits than its factorization.

189900027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100009 (or 21100006 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 189900027 is about 13780.4218730778. The cubic root of 189900027 is about 574.7888595926.

The spelling of 189900027 in words is "one hundred eighty-nine million, nine hundred thousand, twenty-seven".