90543589 has 2 divisors, whose sum is σ = 90543590. Its totient is φ = 90543588.

The previous prime is 90543587. The next prime is 90543611. The reversal of 90543589 is 98534509.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 19731364 = 8415^2 + 4442^2 .

It is a cyclic number.

It is not a de Polignac number, because 90543589 - 2¹ = 90543587 is a prime.

Together with 90543587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90543587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45271794 + 45271795.

It is an arithmetic number, because the mean of its divisors is an integer number (45271795).

Almost surely, 2^90543589 is an apocalyptic number.

It is an amenable number.

90543589 is a deficient number, since it is larger than the sum of its proper divisors (1).

90543589 is an equidigital number, since it uses as much as digits as its factorization.

90543589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 90543589 is about 9515.4395064022. The cubic root of 90543589 is about 449.0409021556.

The spelling of 90543589 in words is "ninety million, five hundred forty-three thousand, five hundred eighty-nine".