90211 has 8 divisors (see below), whose sum is σ = 100800. Its totient is φ = 80040.

The previous prime is 90203. The next prime is 90217. The reversal of 90211 is 11209.

90211 is nontrivially palindromic in base 6.

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 90211 - 2³ = 90203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90191 and 90200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 580 + ... + 718.

It is an arithmetic number, because the mean of its divisors is an integer number (12600).

2⁹⁰²¹¹ is an apocalyptic number.

90211 is a deficient number, since it is larger than the sum of its proper divisors (10589).

90211 is a wasteful number, since it uses less digits than its factorization.

90211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 90211 is about 300.3514607922. The cubic root of 90211 is about 44.8490414808.

The spelling of 90211 in words is "ninety thousand, two hundred eleven".