90193633 has 2 divisors, whose sum is σ = 90193634. Its totient is φ = 90193632.

The previous prime is 90193613. The next prime is 90193639. The reversal of 90193633 is 33639109.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88887184 + 1306449 = 9428^2 + 1143^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90193633 is a prime.

It is not a weakly prime, because it can be changed into another prime (90193639) 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, 45096816 + 45096817.

It is an arithmetic number, because the mean of its divisors is an integer number (45096817).

Almost surely, 2^90193633 is an apocalyptic number.

It is an amenable number.

90193633 is a deficient number, since it is larger than the sum of its proper divisors (1).

90193633 is an equidigital number, since it uses as much as digits as its factorization.

90193633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 90193633 is about 9497.0328524229. The cubic root of 90193633 is about 448.4616325352.

The spelling of 90193633 in words is "ninety million, one hundred ninety-three thousand, six hundred thirty-three".