90323089 has 2 divisors, whose sum is σ = 90323090. Its totient is φ = 90323088.

The previous prime is 90323083. The next prime is 90323099. The reversal of 90323089 is 98032309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 30338064 = 7745^2 + 5508^2 .

It is an emirp because it is prime and its reverse (98032309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90323089 - 2⁹ = 90322577 is a prime.

It is not a weakly prime, because it can be changed into another prime (90323083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45161544 + 45161545.

It is an arithmetic number, because the mean of its divisors is an integer number (45161545).

Almost surely, 2^90323089 is an apocalyptic number.

It is an amenable number.

90323089 is a deficient number, since it is larger than the sum of its proper divisors (1).

90323089 is an equidigital number, since it uses as much as digits as its factorization.

90323089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 90323089 is about 9503.8460109579. The cubic root of 90323089 is about 448.6760907444.

It can be divided in two parts, 9032 and 3089, that added together give a palindrome (12121).

The spelling of 90323089 in words is "ninety million, three hundred twenty-three thousand, eighty-nine".