939985 has 8 divisors (see below), whose sum is σ = 1158696. Its totient is φ = 731520.

The previous prime is 939973. The next prime is 939989. The reversal of 939985 is 589939.

It can be written as a sum of positive squares in 4 ways, for example, as 108241 + 831744 = 329^2 + 912^2 .

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

It is not a de Polignac number, because 939985 - 2¹⁵ = 907217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2356 + ... + 2725.

It is an arithmetic number, because the mean of its divisors is an integer number (144837).

2⁹³⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

939985 is a deficient number, since it is larger than the sum of its proper divisors (218711).

939985 is a wasteful number, since it uses less digits than its factorization.

939985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its digits is 87480, while the sum is 43.

The square root of 939985 is about 969.5282357931. The cubic root of 939985 is about 97.9580898123.

The spelling of 939985 in words is "nine hundred thirty-nine thousand, nine hundred eighty-five".