939947 has 4 divisors (see below), whose sum is σ = 995256. Its totient is φ = 884640.

The previous prime is 939931. The next prime is 939971. The reversal of 939947 is 749939.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 939947 - 2⁴ = 939931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27629 + ... + 27662.

It is an arithmetic number, because the mean of its divisors is an integer number (248814).

2⁹³⁹⁹⁴⁷ is an apocalyptic number.

939947 is a deficient number, since it is larger than the sum of its proper divisors (55309).

939947 is a wasteful number, since it uses less digits than its factorization.

939947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55308.

The product of its digits is 61236, while the sum is 41.

The square root of 939947 is about 969.5086384350. The cubic root of 939947 is about 97.9567697709.

The spelling of 939947 in words is "nine hundred thirty-nine thousand, nine hundred forty-seven".