939939 has 32 divisors (see below), whose sum is σ = 1688064. Its totient is φ = 449280.

The previous prime is 939931. The next prime is 939971.

939939 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 939939 - 2³ = 939931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 939939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2847 + ... + 3159.

It is an arithmetic number, because the mean of its divisors is an integer number (52752).

2⁹³⁹⁹³⁹ is an apocalyptic number.

939939 is a deficient number, since it is larger than the sum of its proper divisors (748125).

939939 is a wasteful number, since it uses less digits than its factorization.

939939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347.

The product of its digits is 59049, while the sum is 42.

The square root of 939939 is about 969.5045126249. The cubic root of 939939 is about 97.9564918629.

The spelling of 939939 in words is "nine hundred thirty-nine thousand, nine hundred thirty-nine".