90522689 has 4 divisors (see below), whose sum is σ = 90621060. Its totient is φ = 90424320.

The previous prime is 90522673. The next prime is 90522709. The reversal of 90522689 is 98622509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98622509 = 83 ⋅1188223.

It can be written as a sum of positive squares in 2 ways, for example, as 13082689 + 77440000 = 3617^2 + 8800^2 .

It is a cyclic number.

It is not a de Polignac number, because 90522689 - 2⁴ = 90522673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90522989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47792 + ... + 49649.

It is an arithmetic number, because the mean of its divisors is an integer number (22655265).

Almost surely, 2^90522689 is an apocalyptic number.

It is an amenable number.

90522689 is a deficient number, since it is larger than the sum of its proper divisors (98371).

90522689 is an equidigital number, since it uses as much as digits as its factorization.

90522689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98370.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 90522689 is about 9514.3412278518. The cubic root of 90522689 is about 449.0063490851.

The spelling of 90522689 in words is "ninety million, five hundred twenty-two thousand, six hundred eighty-nine".