90533633 has 2 divisors, whose sum is σ = 90533634. Its totient is φ = 90533632.

The previous prime is 90533629. The next prime is 90533659. The reversal of 90533633 is 33633509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85229824 + 5303809 = 9232^2 + 2303^2 .

It is a cyclic number.

It is not a de Polignac number, because 90533633 - 2² = 90533629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90533633.

It is not a weakly prime, because it can be changed into another prime (90533693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45266816 + 45266817.

It is an arithmetic number, because the mean of its divisors is an integer number (45266817).

Almost surely, 2^90533633 is an apocalyptic number.

It is an amenable number.

90533633 is a deficient number, since it is larger than the sum of its proper divisors (1).

90533633 is an equidigital number, since it uses as much as digits as its factorization.

90533633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 32.

The square root of 90533633 is about 9514.9163422492. The cubic root of 90533633 is about 449.0244429925.

The spelling of 90533633 in words is "ninety million, five hundred thirty-three thousand, six hundred thirty-three".