90782817 has 16 divisors (see below), whose sum is σ = 132956160. Its totient is φ = 54842832.

The previous prime is 90782807. The next prime is 90782819. The reversal of 90782817 is 71828709.

It is not a de Polignac number, because 90782817 - 2⁶ = 90782753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90782819) 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 in 15 ways as a sum of consecutive naturals, for example, 33313 + ... + 35934.

It is an arithmetic number, because the mean of its divisors is an integer number (8309760).

Almost surely, 2^90782817 is an apocalyptic number.

It is an amenable number.

90782817 is a deficient number, since it is larger than the sum of its proper divisors (42173343).

90782817 is a wasteful number, since it uses less digits than its factorization.

90782817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69292.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 90782817 is about 9528.0017317379. The cubic root of 90782817 is about 449.4360292912.

The spelling of 90782817 in words is "ninety million, seven hundred eighty-two thousand, eight hundred seventeen".