90805533 has 32 divisors (see below), whose sum is σ = 149538816. Its totient is φ = 47729088.

The previous prime is 90805531. The next prime is 90805549. The reversal of 90805533 is 33550809.

It is not a de Polignac number, because 90805533 - 2¹ = 90805531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90805494 and 90805503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90805531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132610 + ... + 133292.

It is an arithmetic number, because the mean of its divisors is an integer number (4673088).

Almost surely, 2^90805533 is an apocalyptic number.

It is an amenable number.

90805533 is a deficient number, since it is larger than the sum of its proper divisors (58733283).

90805533 is a wasteful number, since it uses less digits than its factorization.

90805533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 90805533 is about 9529.1937224510. The cubic root of 90805533 is about 449.4735126599.

The spelling of 90805533 in words is "ninety million, eight hundred five thousand, five hundred thirty-three".