491677 has 2 divisors, whose sum is σ = 491678. Its totient is φ = 491676.

The previous prime is 491669. The next prime is 491707. The reversal of 491677 is 776194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436921 + 54756 = 661^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 491677 - 2³ = 491669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245838 + 245839.

It is an arithmetic number, because the mean of its divisors is an integer number (245839).

2⁴⁹¹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

491677 is a deficient number, since it is larger than the sum of its proper divisors (1).

491677 is an equidigital number, since it uses as much as digits as its factorization.

491677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 491677 is about 701.1968339917. The cubic root of 491677 is about 78.9271881598.

The spelling of 491677 in words is "four hundred ninety-one thousand, six hundred seventy-seven".