938221 has 4 divisors (see below), whose sum is σ = 940732. Its totient is φ = 935712.

The previous prime is 938219. The next prime is 938233. The reversal of 938221 is 122839.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 275625 = 814^2 + 525^2 .

It is a 4-Lehmer number, since φ(938221) divides (938221-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 938221 - 2¹ = 938219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570 + ... + 1483.

It is an arithmetic number, because the mean of its divisors is an integer number (235183).

2⁹³⁸²²¹ is an apocalyptic number.

It is an amenable number.

938221 is a deficient number, since it is larger than the sum of its proper divisors (2511).

938221 is a wasteful number, since it uses less digits than its factorization.

938221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510.

The product of its digits is 864, while the sum is 25.

The square root of 938221 is about 968.6180877931. The cubic root of 938221 is about 97.8967745517.

The spelling of 938221 in words is "nine hundred thirty-eight thousand, two hundred twenty-one".