90566533 has 2 divisors, whose sum is σ = 90566534. Its totient is φ = 90566532.

The previous prime is 90566527. The next prime is 90566587. The reversal of 90566533 is 33566509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76073284 + 14493249 = 8722^2 + 3807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90566533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90566492 and 90566501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90566933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45283266 + 45283267.

It is an arithmetic number, because the mean of its divisors is an integer number (45283267).

Almost surely, 2^90566533 is an apocalyptic number.

It is an amenable number.

90566533 is a deficient number, since it is larger than the sum of its proper divisors (1).

90566533 is an equidigital number, since it uses as much as digits as its factorization.

90566533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 37.

The square root of 90566533 is about 9516.6450495960. The cubic root of 90566533 is about 449.0788283613.

The spelling of 90566533 in words is "ninety million, five hundred sixty-six thousand, five hundred thirty-three".