84890189 has 4 divisors (see below), whose sum is σ = 84968256. Its totient is φ = 84812124.

The previous prime is 84890137. The next prime is 84890207. The reversal of 84890189 is 98109848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84890189 - 2¹² = 84886093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84890089) 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, 37379 + ... + 39584.

It is an arithmetic number, because the mean of its divisors is an integer number (21242064).

Almost surely, 2^84890189 is an apocalyptic number.

It is an amenable number.

84890189 is a deficient number, since it is larger than the sum of its proper divisors (78067).

84890189 is a wasteful number, since it uses less digits than its factorization.

84890189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78066.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 84890189 is about 9213.5871950072. The cubic root of 84890189 is about 439.4935443413.

The spelling of 84890189 in words is "eighty-four million, eight hundred ninety thousand, one hundred eighty-nine".