90840733 has 2 divisors, whose sum is σ = 90840734. Its totient is φ = 90840732.

The previous prime is 90840719. The next prime is 90840749. The reversal of 90840733 is 33704809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71944324 + 18896409 = 8482^2 + 4347^2 .

It is an emirp because it is prime and its reverse (33704809) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90840733 - 2⁹ = 90840221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90840703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45420366 + 45420367.

It is an arithmetic number, because the mean of its divisors is an integer number (45420367).

Almost surely, 2^90840733 is an apocalyptic number.

It is an amenable number.

90840733 is a deficient number, since it is larger than the sum of its proper divisors (1).

90840733 is an equidigital number, since it uses as much as digits as its factorization.

90840733 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 90840733 is about 9531.0404993369. The cubic root of 90840733 is about 449.5315833641.

The spelling of 90840733 in words is "ninety million, eight hundred forty thousand, seven hundred thirty-three".