947939 has 4 divisors (see below), whose sum is σ = 958680. Its totient is φ = 937200.

The previous prime is 947927. The next prime is 947959. The reversal of 947939 is 939749.

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 947939 - 2¹² = 943843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 947896 and 947905.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947939.

It is not an unprimeable number, because it can be changed into a prime (947959) 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, 5237 + ... + 5414.

It is an arithmetic number, because the mean of its divisors is an integer number (239670).

2⁹⁴⁷⁹³⁹ is an apocalyptic number.

947939 is a deficient number, since it is larger than the sum of its proper divisors (10741).

947939 is a wasteful number, since it uses less digits than its factorization.

947939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740.

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

The square root of 947939 is about 973.6215897360. The cubic root of 947939 is about 98.2336159166.

The spelling of 947939 in words is "nine hundred forty-seven thousand, nine hundred thirty-nine".