84640589 has 12 divisors (see below), whose sum is σ = 96246780. Its totient is φ = 74289600.

The previous prime is 84640579. The next prime is 84640597. The reversal of 84640589 is 98504648.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33988900 + 50651689 = 5830^2 + 7117^2 .

It is not a de Polignac number, because 84640589 - 2²⁰ = 83592013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84640519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8552 + ... + 15569.

It is an arithmetic number, because the mean of its divisors is an integer number (8020565).

Almost surely, 2^84640589 is an apocalyptic number.

It is an amenable number.

84640589 is a deficient number, since it is larger than the sum of its proper divisors (11606191).

84640589 is a wasteful number, since it uses less digits than its factorization.

84640589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24172 (or 24161 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 84640589 is about 9200.0320108139. The cubic root of 84640589 is about 439.0623783868.

The spelling of 84640589 in words is "eighty-four million, six hundred forty thousand, five hundred eighty-nine".