84589391 has 4 divisors (see below), whose sum is σ = 85027872. Its totient is φ = 84150912.

The previous prime is 84589381. The next prime is 84589409. The reversal of 84589391 is 19398548.

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

It is a cyclic number.

It is not a de Polignac number, because 84589391 - 2⁶ = 84589327 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 (84589321) 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, 218951 + ... + 219336.

It is an arithmetic number, because the mean of its divisors is an integer number (21256968).

Almost surely, 2^84589391 is an apocalyptic number.

84589391 is a deficient number, since it is larger than the sum of its proper divisors (438481).

84589391 is a wasteful number, since it uses less digits than its factorization.

84589391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438480.

The product of its digits is 311040, while the sum is 47.

The square root of 84589391 is about 9197.2490995949. The cubic root of 84589391 is about 438.9738328088.

The spelling of 84589391 in words is "eighty-four million, five hundred eighty-nine thousand, three hundred ninety-one".