491847 has 8 divisors (see below), whose sum is σ = 665856. Its totient is φ = 322872.

The previous prime is 491837. The next prime is 491851. The reversal of 491847 is 748194.

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

It is not a de Polignac number, because 491847 - 2⁶ = 491783 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

491847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1023 + ... + 1424.

It is an arithmetic number, because the mean of its divisors is an integer number (83232).

2⁴⁹¹⁸⁴⁷ is an apocalyptic number.

491847 is a deficient number, since it is larger than the sum of its proper divisors (174009).

491847 is a wasteful number, since it uses less digits than its factorization.

491847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517.

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

The square root of 491847 is about 701.3180448270. The cubic root of 491847 is about 78.9362836133.

The spelling of 491847 in words is "four hundred ninety-one thousand, eight hundred forty-seven".