84156589 has 6 divisors (see below), whose sum is σ = 92502830. Its totient is φ = 76505880.

The previous prime is 84156557. The next prime is 84156593. The reversal of 84156589 is 98565148.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 1800964 = 9075^2 + 1342^2 .

It is not a de Polignac number, because 84156589 - 2⁵ = 84156557 is a prime.

It is a super-2 number, since 2×84156589² = 14164662944229842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84156539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 347634 + ... + 347875.

Almost surely, 2^84156589 is an apocalyptic number.

It is an amenable number.

84156589 is a deficient number, since it is larger than the sum of its proper divisors (8346241).

84156589 is a wasteful number, since it uses less digits than its factorization.

84156589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695531 (or 695520 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The square root of 84156589 is about 9173.6900427254. The cubic root of 84156589 is about 438.2238817774.

The spelling of 84156589 in words is "eighty-four million, one hundred fifty-six thousand, five hundred eighty-nine".