90682809 has 16 divisors (see below), whose sum is σ = 138482688. Its totient is φ = 51706512.

The previous prime is 90682807. The next prime is 90682817. The reversal of 90682809 is 90828609.

It is not a de Polignac number, because 90682809 - 2¹ = 90682807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90682807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5794 + ... + 14660.

It is an arithmetic number, because the mean of its divisors is an integer number (8655168).

Almost surely, 2^90682809 is an apocalyptic number.

It is an amenable number.

90682809 is a deficient number, since it is larger than the sum of its proper divisors (47799879).

90682809 is a wasteful number, since it uses less digits than its factorization.

90682809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 90682809 is about 9522.7521757105. The cubic root of 90682809 is about 449.2709330211.

The spelling of 90682809 in words is "ninety million, six hundred eighty-two thousand, eight hundred nine".