90790689 has 16 divisors (see below), whose sum is σ = 133346304. Its totient is φ = 54488400.

The previous prime is 90790669. The next prime is 90790697. The reversal of 90790689 is 98609709.

It is a happy number.

It is not a de Polignac number, because 90790689 - 2⁵ = 90790657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90790669) 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, 9957 + ... + 16754.

It is an arithmetic number, because the mean of its divisors is an integer number (8334144).

Almost surely, 2^90790689 is an apocalyptic number.

It is an amenable number.

90790689 is a deficient number, since it is larger than the sum of its proper divisors (42555615).

90790689 is a wasteful number, since it uses less digits than its factorization.

90790689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26828.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 90790689 is about 9528.4148209448. The cubic root of 90790689 is about 449.4490194813.

The spelling of 90790689 in words is "ninety million, seven hundred ninety thousand, six hundred eighty-nine".