90087433 has 2 divisors, whose sum is σ = 90087434. Its totient is φ = 90087432.

The previous prime is 90087421. The next prime is 90087443. The reversal of 90087433 is 33478009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52301824 + 37785609 = 7232^2 + 6147^2 .

It is an emirp because it is prime and its reverse (33478009) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90087433 is a prime.

It is not a weakly prime, because it can be changed into another prime (90087443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45043716 + 45043717.

It is an arithmetic number, because the mean of its divisors is an integer number (45043717).

Almost surely, 2^90087433 is an apocalyptic number.

It is an amenable number.

90087433 is a deficient number, since it is larger than the sum of its proper divisors (1).

90087433 is an equidigital number, since it uses as much as digits as its factorization.

90087433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 90087433 is about 9491.4399855870. The cubic root of 90087433 is about 448.2855471918.

The spelling of 90087433 in words is "ninety million, eighty-seven thousand, four hundred thirty-three".