486991 has 2 divisors, whose sum is σ = 486992. Its totient is φ = 486990.

The previous prime is 486977. The next prime is 487007. The reversal of 486991 is 199684.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-486991 is a prime.

486991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 486991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (486971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243495 + 243496.

It is an arithmetic number, because the mean of its divisors is an integer number (243496).

2⁴⁸⁶⁹⁹¹ is an apocalyptic number.

486991 is a deficient number, since it is larger than the sum of its proper divisors (1).

486991 is an equidigital number, since it uses as much as digits as its factorization.

486991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 37.

The square root of 486991 is about 697.8474045234. The cubic root of 486991 is about 78.6756449423.

The spelling of 486991 in words is "four hundred eighty-six thousand, nine hundred ninety-one".