90020201 has 8 divisors (see below), whose sum is σ = 91646664. Its totient is φ = 88398720.

The previous prime is 90020197. The next prime is 90020209. The reversal of 90020201 is 10202009.

It can be written as a sum of positive squares in 4 ways, for example, as 4734976 + 85285225 = 2176^2 + 9235^2 .

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 90020201 - 2² = 90020197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90020209) 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, 72155 + ... + 73391.

It is an arithmetic number, because the mean of its divisors is an integer number (11455833).

Almost surely, 2^90020201 is an apocalyptic number.

It is an amenable number.

90020201 is a deficient number, since it is larger than the sum of its proper divisors (1626463).

90020201 is a wasteful number, since it uses less digits than its factorization.

90020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 90020201 is about 9487.8976069517. The cubic root of 90020201 is about 448.1740013538.

The spelling of 90020201 in words is "ninety million, twenty thousand, two hundred one".