491747 has 2 divisors, whose sum is σ = 491748. Its totient is φ = 491746.

The previous prime is 491737. The next prime is 491773. The reversal of 491747 is 747194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491747 - 2⁴ = 491731 is a prime.

It is a super-2 number, since 2×491747² = 483630224018, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (491707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245873 + 245874.

It is an arithmetic number, because the mean of its divisors is an integer number (245874).

2⁴⁹¹⁷⁴⁷ is an apocalyptic number.

491747 is a deficient number, since it is larger than the sum of its proper divisors (1).

491747 is an equidigital number, since it uses as much as digits as its factorization.

491747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 491747 is about 701.2467468730. The cubic root of 491747 is about 78.9309336004.

The spelling of 491747 in words is "four hundred ninety-one thousand, seven hundred forty-seven".