90133523 has 4 divisors (see below), whose sum is σ = 93041088. Its totient is φ = 87225960.

The previous prime is 90133513. The next prime is 90133531. The reversal of 90133523 is 32533109.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90133523 - 2¹⁶ = 90067987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90133492 and 90133501.

It is not an unprimeable number, because it can be changed into a prime (90133513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1453736 + ... + 1453797.

It is an arithmetic number, because the mean of its divisors is an integer number (23260272).

Almost surely, 2^90133523 is an apocalyptic number.

90133523 is a deficient number, since it is larger than the sum of its proper divisors (2907565).

90133523 is a wasteful number, since it uses less digits than its factorization.

90133523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907564.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 90133523 is about 9493.8676523322. The cubic root of 90133523 is about 448.3619838919.

The spelling of 90133523 in words is "ninety million, one hundred thirty-three thousand, five hundred twenty-three".