84108889 has 4 divisors (see below), whose sum is σ = 84334756. Its totient is φ = 83883024.

The previous prime is 84108863. The next prime is 84108923. The reversal of 84108889 is 98880148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67568400 + 16540489 = 8220^2 + 4067^2 .

It is a cyclic number.

It is not a de Polignac number, because 84108889 - 2¹³ = 84100697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84106889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112374 + ... + 113119.

It is an arithmetic number, because the mean of its divisors is an integer number (21083689).

Almost surely, 2^84108889 is an apocalyptic number.

It is an amenable number.

84108889 is a deficient number, since it is larger than the sum of its proper divisors (225867).

84108889 is a wasteful number, since it uses less digits than its factorization.

84108889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225866.

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 84108889 is about 9171.0898479952. The cubic root of 84108889 is about 438.1410709522.

The spelling of 84108889 in words is "eighty-four million, one hundred eight thousand, eight hundred eighty-nine".