90806589 has 20 divisors (see below), whose sum is σ = 136030620. Its totient is φ = 60367680.

The previous prime is 90806587. The next prime is 90806623. The reversal of 90806589 is 98560809.

It can be written as a sum of positive squares in 2 ways, for example, as 57836025 + 32970564 = 7605^2 + 5742^2 .

It is not a de Polignac number, because 90806589 - 2¹ = 90806587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90806587) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31759 + ... + 34499.

It is an arithmetic number, because the mean of its divisors is an integer number (6801531).

Almost surely, 2^90806589 is an apocalyptic number.

It is an amenable number.

90806589 is a deficient number, since it is larger than the sum of its proper divisors (45224031).

90806589 is a wasteful number, since it uses less digits than its factorization.

90806589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 3153 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 90806589 is about 9529.2491309651. The cubic root of 90806589 is about 449.4752549994.

The spelling of 90806589 in words is "ninety million, eight hundred six thousand, five hundred eighty-nine".