90328609 has 12 divisors (see below), whose sum is σ = 105383424. Its totient is φ = 77198184.

The previous prime is 90328597. The next prime is 90328673. The reversal of 90328609 is 90682309.

It is not a de Polignac number, because 90328609 - 2⁵ = 90328577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90328309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15472 + ... + 20494.

It is an arithmetic number, because the mean of its divisors is an integer number (8781952).

Almost surely, 2^90328609 is an apocalyptic number.

It is an amenable number.

90328609 is a deficient number, since it is larger than the sum of its proper divisors (15054815).

90328609 is a wasteful number, since it uses less digits than its factorization.

90328609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404 (or 5397 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 90328609 is about 9504.1364152668. The cubic root of 90328609 is about 448.6852306797.

The spelling of 90328609 in words is "ninety million, three hundred twenty-eight thousand, six hundred nine".