947971 has 4 divisors (see below), whose sum is σ = 1003752. Its totient is φ = 892192.

The previous prime is 947963. The next prime is 947987. The reversal of 947971 is 179749.

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 947971 - 2³ = 947963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 947971.

It is not an unprimeable number, because it can be changed into a prime (947911) 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 3 ways as a sum of consecutive naturals, for example, 27865 + ... + 27898.

It is an arithmetic number, because the mean of its divisors is an integer number (250938).

2⁹⁴⁷⁹⁷¹ is an apocalyptic number.

947971 is a deficient number, since it is larger than the sum of its proper divisors (55781).

947971 is a wasteful number, since it uses less digits than its factorization.

947971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55780.

The product of its digits is 15876, while the sum is 37.

The square root of 947971 is about 973.6380230866. The cubic root of 947971 is about 98.2347212762.

The spelling of 947971 in words is "nine hundred forty-seven thousand, nine hundred seventy-one".