189008163 has 6 divisors (see below), whose sum is σ = 273011804. Its totient is φ = 126005436.

The previous prime is 189008161. The next prime is 189008189. The reversal of 189008163 is 361800981.

It is not a de Polignac number, because 189008163 - 2¹ = 189008161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189008161) 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, 10500445 + ... + 10500462.

Almost surely, 2^189008163 is an apocalyptic number.

189008163 is a deficient number, since it is larger than the sum of its proper divisors (84003641).

189008163 is a wasteful number, since it uses less digits than its factorization.

189008163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21000913 (or 21000910 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 189008163 is about 13748.0239671016. The cubic root of 189008163 is about 573.8876167536.

The spelling of 189008163 in words is "one hundred eighty-nine million, eight thousand, one hundred sixty-three".