189206689 has 16 divisors (see below), whose sum is σ = 224291200. Its totient is φ = 159500880.

The previous prime is 189206681. The next prime is 189206707. The reversal of 189206689 is 986602981.

It is a happy number.

It is not a de Polignac number, because 189206689 - 2³ = 189206681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (189206681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16402 + ... + 25444.

It is an arithmetic number, because the mean of its divisors is an integer number (14018200).

Almost surely, 2^189206689 is an apocalyptic number.

It is an amenable number.

189206689 is a deficient number, since it is larger than the sum of its proper divisors (35084511).

189206689 is an frugal number, since it uses more digits than its factorization.

189206689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9125 (or 9111 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 49.

The square root of 189206689 is about 13755.2422370528. The cubic root of 189206689 is about 574.0884753565.

The spelling of 189206689 in words is "one hundred eighty-nine million, two hundred six thousand, six hundred eighty-nine".