491947 has 8 divisors (see below), whose sum is σ = 522144. Its totient is φ = 462528.

The previous prime is 491923. The next prime is 491951. The reversal of 491947 is 749194.

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

It is not a de Polignac number, because 491947 - 2⁷ = 491819 is a prime.

It is a Duffinian number.

491947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (491977) 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, 1533 + ... + 1825.

It is an arithmetic number, because the mean of its divisors is an integer number (65268).

2⁴⁹¹⁹⁴⁷ is an apocalyptic number.

491947 is a deficient number, since it is larger than the sum of its proper divisors (30197).

491947 is a wasteful number, since it uses less digits than its factorization.

491947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 9072, while the sum is 34.

The square root of 491947 is about 701.3893355334. The cubic root of 491947 is about 78.9416329011.

The spelling of 491947 in words is "four hundred ninety-one thousand, nine hundred forty-seven".