939689 has 8 divisors (see below), whose sum is σ = 978120. Its totient is φ = 902016.

The previous prime is 939677. The next prime is 939707. The reversal of 939689 is 986939.

It can be written as a sum of positive squares in 4 ways, for example, as 267289 + 672400 = 517^2 + 820^2 .

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 939689 - 2¹² = 935593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (939649) 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 7 ways as a sum of consecutive naturals, for example, 3917 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (122265).

2⁹³⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

939689 is a deficient number, since it is larger than the sum of its proper divisors (38431).

939689 is a wasteful number, since it uses less digits than its factorization.

939689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its digits is 104976, while the sum is 44.

The square root of 939689 is about 969.3755722113. The cubic root of 939689 is about 97.9478064430.

The spelling of 939689 in words is "nine hundred thirty-nine thousand, six hundred eighty-nine".