84659889 has 4 divisors (see below), whose sum is σ = 112879856. Its totient is φ = 56439924.

The previous prime is 84659879. The next prime is 84659891. The reversal of 84659889 is 98895648.

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 not a de Polignac number, because 84659889 - 2⁴ = 84659873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84659879) 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, 14109979 + ... + 14109984.

It is an arithmetic number, because the mean of its divisors is an integer number (28219964).

Almost surely, 2^84659889 is an apocalyptic number.

It is an amenable number.

84659889 is a deficient number, since it is larger than the sum of its proper divisors (28219967).

84659889 is a wasteful number, since it uses less digits than its factorization.

84659889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28219966.

The product of its digits is 4976640, while the sum is 57.

The square root of 84659889 is about 9201.0808604207. The cubic root of 84659889 is about 439.0957479557.

The spelling of 84659889 in words is "eighty-four million, six hundred fifty-nine thousand, eight hundred eighty-nine".