90909733 has 2 divisors, whose sum is σ = 90909734. Its totient is φ = 90909732.

The previous prime is 90909719. The next prime is 90909773. The reversal of 90909733 is 33790909.

It is a happy number.

It is an a-pointer prime, because the next prime (90909773) can be obtained adding 90909733 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63473089 + 27436644 = 7967^2 + 5238^2 .

It is an emirp because it is prime and its reverse (33790909) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90909733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90909713) 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, 45454866 + 45454867.

It is an arithmetic number, because the mean of its divisors is an integer number (45454867).

Almost surely, 2^90909733 is an apocalyptic number.

It is an amenable number.

90909733 is a deficient number, since it is larger than the sum of its proper divisors (1).

90909733 is an equidigital number, since it uses as much as digits as its factorization.

90909733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 90909733 is about 9534.6595639278. The cubic root of 90909733 is about 449.6453716327.

The spelling of 90909733 in words is "ninety million, nine hundred nine thousand, seven hundred thirty-three".