90538559 has 2 divisors, whose sum is σ = 90538560. Its totient is φ = 90538558.

The previous prime is 90538541. The next prime is 90538571. The reversal of 90538559 is 95583509.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90538559 - 2⁸ = 90538303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90538529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45269279 + 45269280.

It is an arithmetic number, because the mean of its divisors is an integer number (45269280).

Almost surely, 2^90538559 is an apocalyptic number.

90538559 is a deficient number, since it is larger than the sum of its proper divisors (1).

90538559 is an equidigital number, since it uses as much as digits as its factorization.

90538559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 44.

The square root of 90538559 is about 9515.1751954444. The cubic root of 90538559 is about 449.0325867590.

The spelling of 90538559 in words is "ninety million, five hundred thirty-eight thousand, five hundred fifty-nine".