90669290 has 16 divisors (see below), whose sum is σ = 163565568. Its totient is φ = 36187536.

The previous prime is 90669281. The next prime is 90669301. The reversal of 90669290 is 9296609.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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, 5162 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (10222848).

Almost surely, 2^90669290 is an apocalyptic number.

90669290 is a deficient number, since it is larger than the sum of its proper divisors (72896278).

90669290 is a wasteful number, since it uses less digits than its factorization.

90669290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20053.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 90669290 is about 9522.0423229473. The cubic root of 90669290 is about 449.2486061301.

The spelling of 90669290 in words is "ninety million, six hundred sixty-nine thousand, two hundred ninety".