90000089 has 2 divisors, whose sum is σ = 90000090. Its totient is φ = 90000088.

The previous prime is 90000083. The next prime is 90000103. The reversal of 90000089 is 98000009.

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., 54096025 + 35904064 = 7355^2 + 5992^2 .

It is a cyclic number.

It is not a de Polignac number, because 90000089 - 2⁴ = 90000073 is a prime.

It is not a weakly prime, because it can be changed into another prime (90000083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45000044 + 45000045.

It is an arithmetic number, because the mean of its divisors is an integer number (45000045).

Almost surely, 2^90000089 is an apocalyptic number.

It is an amenable number.

90000089 is a deficient number, since it is larger than the sum of its proper divisors (1).

90000089 is an equidigital number, since it uses as much as digits as its factorization.

90000089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90000089 is about 9486.8376712158. The cubic root of 90000089 is about 448.1406223760.

The spelling of 90000089 in words is "ninety million, eighty-nine", and thus it is an aban number and an uban number.