90340221 has 8 divisors (see below), whose sum is σ = 120605760. Its totient is φ = 60150752.

The previous prime is 90340219. The next prime is 90340241. The reversal of 90340221 is 12204309.

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 90340221 - 2¹ = 90340219 is a prime.

It is a super-2 number, since 2×90340221² = 16322711060657682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90340241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16185 + ... + 21038.

It is an arithmetic number, because the mean of its divisors is an integer number (15075720).

Almost surely, 2^90340221 is an apocalyptic number.

It is an amenable number.

90340221 is a deficient number, since it is larger than the sum of its proper divisors (30265539).

90340221 is a wasteful number, since it uses less digits than its factorization.

90340221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38035.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 90340221 is about 9504.7472875401. The cubic root of 90340221 is about 448.7044564441.

The spelling of 90340221 in words is "ninety million, three hundred forty thousand, two hundred twenty-one".