939905 has 8 divisors (see below), whose sum is σ = 1133352. Its totient is φ = 748288.

The previous prime is 939901. The next prime is 939923. The reversal of 939905 is 509939.

939905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10609 + 929296 = 103^2 + 964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 939905 - 2² = 939901 is a prime.

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 (939901) 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, 1289 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (141669).

2⁹³⁹⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

939905 is a deficient number, since it is larger than the sum of its proper divisors (193447).

939905 is a wasteful number, since it uses less digits than its factorization.

939905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915.

The product of its (nonzero) digits is 10935, while the sum is 35.

The square root of 939905 is about 969.4869777362. The cubic root of 939905 is about 97.9553107363.

The spelling of 939905 in words is "nine hundred thirty-nine thousand, nine hundred five".