90657689 has 8 divisors (see below), whose sum is σ = 94158720. Its totient is φ = 87222256.

The previous prime is 90657599. The next prime is 90657691. The reversal of 90657689 is 98675609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90657689 - 2²⁴ = 73880473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90657089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13574 + ... + 19119.

It is an arithmetic number, because the mean of its divisors is an integer number (11769840).

Almost surely, 2^90657689 is an apocalyptic number.

It is an amenable number.

90657689 is a deficient number, since it is larger than the sum of its proper divisors (3501031).

90657689 is a wasteful number, since it uses less digits than its factorization.

90657689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32799.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 90657689 is about 9521.4331379262. The cubic root of 90657689 is about 449.2294450838.

The spelling of 90657689 in words is "ninety million, six hundred fifty-seven thousand, six hundred eighty-nine".