939621 has 4 divisors (see below), whose sum is σ = 1252832. Its totient is φ = 626412.

The previous prime is 939613. The next prime is 939623. The reversal of 939621 is 126939.

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 not a de Polignac number, because 939621 - 2³ = 939613 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939623) 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, 156601 + ... + 156606.

It is an arithmetic number, because the mean of its divisors is an integer number (313208).

2⁹³⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

939621 is a deficient number, since it is larger than the sum of its proper divisors (313211).

939621 is a wasteful number, since it uses less digits than its factorization.

939621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313210.

The product of its digits is 2916, while the sum is 30.

The square root of 939621 is about 969.3404974517. The cubic root of 939621 is about 97.9454437424.

The spelling of 939621 in words is "nine hundred thirty-nine thousand, six hundred twenty-one".