90384559 has 2 divisors, whose sum is σ = 90384560. Its totient is φ = 90384558.

The previous prime is 90384533. The next prime is 90384607. The reversal of 90384559 is 95548309.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90384559 - 2²⁵ = 56830127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90384059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45192279 + 45192280.

It is an arithmetic number, because the mean of its divisors is an integer number (45192280).

Almost surely, 2^90384559 is an apocalyptic number.

90384559 is a deficient number, since it is larger than the sum of its proper divisors (1).

90384559 is an equidigital number, since it uses as much as digits as its factorization.

90384559 is an evil number, because the sum of its binary digits is even.

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

The square root of 90384559 is about 9507.0794148361. The cubic root of 90384559 is about 448.7778508642. Note that the first 3 decimals are identical.

The spelling of 90384559 in words is "ninety million, three hundred eighty-four thousand, five hundred fifty-nine".