939805 has 8 divisors (see below), whose sum is σ = 1139544. Its totient is φ = 744000.

The previous prime is 939793. The next prime is 939823. The reversal of 939805 is 508939.

It can be written as a sum of positive squares in 4 ways, for example, as 52441 + 887364 = 229^2 + 942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 939805 - 2⁵ = 939773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 1435.

It is an arithmetic number, because the mean of its divisors is an integer number (142443).

2⁹³⁹⁸⁰⁵ is an apocalyptic number.

It is an amenable number.

939805 is a deficient number, since it is larger than the sum of its proper divisors (199739).

939805 is a wasteful number, since it uses less digits than its factorization.

939805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 939805 is about 969.4354026958. The cubic root of 939805 is about 97.9518366694.

The spelling of 939805 in words is "nine hundred thirty-nine thousand, eight hundred five".