939221 has 4 divisors (see below), whose sum is σ = 955200. Its totient is φ = 923244.

The previous prime is 939203. The next prime is 939229. The reversal of 939221 is 122939.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 939221 - 2⁶ = 939157 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 (939229) 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, 7901 + ... + 8018.

It is an arithmetic number, because the mean of its divisors is an integer number (238800).

2⁹³⁹²²¹ is an apocalyptic number.

It is an amenable number.

939221 is a deficient number, since it is larger than the sum of its proper divisors (15979).

939221 is a wasteful number, since it uses less digits than its factorization.

939221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15978.

The product of its digits is 972, while the sum is 26.

The square root of 939221 is about 969.1341496408. The cubic root of 939221 is about 97.9315431951.

The spelling of 939221 in words is "nine hundred thirty-nine thousand, two hundred twenty-one".