9090985 has 8 divisors (see below), whose sum is σ = 10926216. Its totient is φ = 7261440.

The previous prime is 9090973. The next prime is 9090989. The reversal of 9090985 is 5890909.

It can be written as a sum of positive squares in 4 ways, for example, as 394384 + 8696601 = 628^2 + 2949^2 .

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

It is not a de Polignac number, because 9090985 - 2⁵ = 9090953 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090989) 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 7 ways as a sum of consecutive naturals, for example, 3955 + ... + 5815.

It is an arithmetic number, because the mean of its divisors is an integer number (1365777).

Almost surely, 2^9090985 is an apocalyptic number.

It is an amenable number.

9090985 is a deficient number, since it is larger than the sum of its proper divisors (1835231).

9090985 is a wasteful number, since it uses less digits than its factorization.

9090985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 9090985 is about 3015.1260338500. The cubic root of 9090985 is about 208.7069831402.

The spelling of 9090985 in words is "nine million, ninety thousand, nine hundred eighty-five".