491827 has 8 divisors (see below), whose sum is σ = 595296. Its totient is φ = 396672.

The previous prime is 491819. The next prime is 491833. The reversal of 491827 is 728194.

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

It is a cyclic number.

It is not a de Polignac number, because 491827 - 2³ = 491819 is a prime.

It is an Ulam number.

It is a Duffinian number.

491827 is a lucky 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, 1948 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (74412).

2⁴⁹¹⁸²⁷ is an apocalyptic number.

491827 is a deficient number, since it is larger than the sum of its proper divisors (103469).

491827 is a wasteful number, since it uses less digits than its factorization.

491827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157.

The product of its digits is 4032, while the sum is 31.

The square root of 491827 is about 701.3037858161. The cubic root of 491827 is about 78.9352136687.

The spelling of 491827 in words is "four hundred ninety-one thousand, eight hundred twenty-seven".