90534559 has 2 divisors, whose sum is σ = 90534560. Its totient is φ = 90534558.

The previous prime is 90534529. The next prime is 90534569. The reversal of 90534559 is 95543509.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90534559 - 2²¹ = 88437407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90534529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45267279 + 45267280.

It is an arithmetic number, because the mean of its divisors is an integer number (45267280).

Almost surely, 2^90534559 is an apocalyptic number.

90534559 is a deficient number, since it is larger than the sum of its proper divisors (1).

90534559 is an equidigital number, since it uses as much as digits as its factorization.

90534559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 90534559 is about 9514.9650025631. The cubic root of 90534559 is about 449.0259738977.

The spelling of 90534559 in words is "ninety million, five hundred thirty-four thousand, five hundred fifty-nine".