90065559 has 16 divisors (see below), whose sum is σ = 122204160. Its totient is φ = 58991520.

The previous prime is 90065557. The next prime is 90065579. The reversal of 90065559 is 95556009.

It is not a de Polignac number, because 90065559 - 2¹ = 90065557 is a prime.

It is a super-3 number, since 3×90065559³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90065551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82314 + ... + 83400.

It is an arithmetic number, because the mean of its divisors is an integer number (7637760).

Almost surely, 2^90065559 is an apocalyptic number.

90065559 is a deficient number, since it is larger than the sum of its proper divisors (32138601).

90065559 is a wasteful number, since it uses less digits than its factorization.

90065559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 60750, while the sum is 39.

The square root of 90065559 is about 9490.2876141875. The cubic root of 90065559 is about 448.2492617319.

The spelling of 90065559 in words is "ninety million, sixty-five thousand, five hundred fifty-nine".