189209164 has 12 divisors (see below), whose sum is σ = 331581600. Its totient is φ = 94471568.

The previous prime is 189209161. The next prime is 189209171. The reversal of 189209164 is 461902981.

It is not an unprimeable number, because it can be changed into a prime (189209161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30019 + ... + 35770.

It is an arithmetic number, because the mean of its divisors is an integer number (27631800).

Almost surely, 2^189209164 is an apocalyptic number.

It is an amenable number.

189209164 is a deficient number, since it is larger than the sum of its proper divisors (142372436).

189209164 is a wasteful number, since it uses less digits than its factorization.

189209164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66512 (or 66510 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 189209164 is about 13755.3322024588. The cubic root of 189209164 is about 574.0909785499.

The spelling of 189209164 in words is "one hundred eighty-nine million, two hundred nine thousand, one hundred sixty-four".