90782793 has 12 divisors (see below), whose sum is σ = 134675268. Its totient is φ = 58885920.

The previous prime is 90782773. The next prime is 90782807. The reversal of 90782793 is 39728709.

It can be written as a sum of positive squares in 2 ways, for example, as 81216144 + 9566649 = 9012^2 + 3093^2 .

It is not a de Polignac number, because 90782793 - 2⁹ = 90782281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90782723) 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 11 ways as a sum of consecutive naturals, for example, 135978 + ... + 136643.

It is an arithmetic number, because the mean of its divisors is an integer number (11222939).

Almost surely, 2^90782793 is an apocalyptic number.

It is an amenable number.

90782793 is a deficient number, since it is larger than the sum of its proper divisors (43892475).

90782793 is a wasteful number, since it uses less digits than its factorization.

90782793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272664 (or 272661 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 90782793 is about 9528.0004722922. Note that the first 3 decimals coincide. The cubic root of 90782793 is about 449.4359896858.

The spelling of 90782793 in words is "ninety million, seven hundred eighty-two thousand, seven hundred ninety-three".