84589661 has 4 divisors (see below), whose sum is σ = 91096572. Its totient is φ = 78082752.

The previous prime is 84589651. The next prime is 84589667. The reversal of 84589661 is 16698548.

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 10956100 + 73633561 = 3310^2 + 8581^2 .

It is a cyclic number.

It is not a de Polignac number, because 84589661 - 2⁶ = 84589597 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 (84589667) 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, 3253436 + ... + 3253461.

It is an arithmetic number, because the mean of its divisors is an integer number (22774143).

Almost surely, 2^84589661 is an apocalyptic number.

It is an amenable number.

84589661 is a deficient number, since it is larger than the sum of its proper divisors (6506911).

84589661 is a wasteful number, since it uses less digits than its factorization.

84589661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6506910.

The product of its digits is 414720, while the sum is 47.

The square root of 84589661 is about 9197.2637778852. The cubic root of 84589661 is about 438.9742998603.

The spelling of 84589661 in words is "eighty-four million, five hundred eighty-nine thousand, six hundred sixty-one".