947891 has 8 divisors (see below), whose sum is σ = 1140480. Its totient is φ = 769608.

The previous prime is 947873. The next prime is 947893. The reversal of 947891 is 198749.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 947891 - 2¹⁸ = 685747 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 947891.

It is not an unprimeable number, because it can be changed into a prime (947893) 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 7 ways as a sum of consecutive naturals, for example, 3431 + ... + 3696.

It is an arithmetic number, because the mean of its divisors is an integer number (142560).

2⁹⁴⁷⁸⁹¹ is an apocalyptic number.

947891 is a deficient number, since it is larger than the sum of its proper divisors (192589).

947891 is a wasteful number, since it uses less digits than its factorization.

947891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7153.

The product of its digits is 18144, while the sum is 38.

The square root of 947891 is about 973.5969391899. The cubic root of 947891 is about 98.2319578306.

The spelling of 947891 in words is "nine hundred forty-seven thousand, eight hundred ninety-one".