847091 has 4 divisors (see below), whose sum is σ = 968112. Its totient is φ = 726072.

The previous prime is 847079. The next prime is 847097. The reversal of 847091 is 190748.

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 847091 - 2¹⁰ = 846067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847097) 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, 60500 + ... + 60513.

It is an arithmetic number, because the mean of its divisors is an integer number (242028).

2⁸⁴⁷⁰⁹¹ is an apocalyptic number.

847091 is a deficient number, since it is larger than the sum of its proper divisors (121021).

847091 is a wasteful number, since it uses less digits than its factorization.

847091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121020.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 847091 is about 920.3754668612. The cubic root of 847091 is about 94.6186373326.

The spelling of 847091 in words is "eight hundred forty-seven thousand, ninety-one".