90117533 has 12 divisors (see below), whose sum is σ = 101737020. Its totient is φ = 79706880.

The previous prime is 90117523. The next prime is 90117541. The reversal of 90117533 is 33571109.

It can be written as a sum of positive squares in 2 ways, for example, as 80766169 + 9351364 = 8987^2 + 3058^2 .

It is not a de Polignac number, because 90117533 - 2⁸ = 90117277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90117496 and 90117505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90117523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5588 + ... + 14541.

It is an arithmetic number, because the mean of its divisors is an integer number (8478085).

Almost surely, 2^90117533 is an apocalyptic number.

It is an amenable number.

90117533 is a deficient number, since it is larger than the sum of its proper divisors (11619487).

90117533 is a wasteful number, since it uses less digits than its factorization.

90117533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20188 (or 20177 counting only the distinct ones).

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 90117533 is about 9493.0254924339. The cubic root of 90117533 is about 448.3354686662.

The spelling of 90117533 in words is "ninety million, one hundred seventeen thousand, five hundred thirty-three".