847491 has 8 divisors (see below), whose sum is σ = 1141584. Its totient is φ = 559200.

The previous prime is 847477. The next prime is 847493. The reversal of 847491 is 194748.

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

It is a de Polignac number, because none of the positive numbers 2^k-847491 is a prime.

847491 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847493) 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 7 ways as a sum of consecutive naturals, for example, 1096 + ... + 1701.

It is an arithmetic number, because the mean of its divisors is an integer number (142698).

2⁸⁴⁷⁴⁹¹ is an apocalyptic number.

847491 is a deficient number, since it is larger than the sum of its proper divisors (294093).

847491 is a wasteful number, since it uses less digits than its factorization.

847491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901.

The product of its digits is 8064, while the sum is 33.

The square root of 847491 is about 920.5927438341. The cubic root of 847491 is about 94.6335280977.

The spelling of 847491 in words is "eight hundred forty-seven thousand, four hundred ninety-one".