90220433 has 2 divisors, whose sum is σ = 90220434. Its totient is φ = 90220432.

The previous prime is 90220397. The next prime is 90220441. The reversal of 90220433 is 33402209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85692049 + 4528384 = 9257^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 90220433 - 2⁶ = 90220369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90220399 and 90220408.

It is not a weakly prime, because it can be changed into another prime (90220463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45110216 + 45110217.

It is an arithmetic number, because the mean of its divisors is an integer number (45110217).

Almost surely, 2^90220433 is an apocalyptic number.

It is an amenable number.

90220433 is a deficient number, since it is larger than the sum of its proper divisors (1).

90220433 is an equidigital number, since it uses as much as digits as its factorization.

90220433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 90220433 is about 9498.4437146303. The cubic root of 90220433 is about 448.5060465407.

The spelling of 90220433 in words is "ninety million, two hundred twenty thousand, four hundred thirty-three".