486813781 has 2 divisors, whose sum is σ = 486813782. Its totient is φ = 486813780.

The previous prime is 486813757. The next prime is 486813823. The reversal of 486813781 is 187318684.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415140625 + 71673156 = 20375^2 + 8466^2 .

It is a cyclic number.

It is not a de Polignac number, because 486813781 - 2¹¹ = 486811733 is a prime.

It is a super-2 number, since 2×486813781² = 473975314743031922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (486813281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243406890 + 243406891.

It is an arithmetic number, because the mean of its divisors is an integer number (243406891).

Almost surely, 2^486813781 is an apocalyptic number.

It is an amenable number.

486813781 is a deficient number, since it is larger than the sum of its proper divisors (1).

486813781 is an equidigital number, since it uses as much as digits as its factorization.

486813781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 46.

The square root of 486813781 is about 22063.8568931182. The cubic root of 486813781 is about 786.6610026843.

The spelling of 486813781 in words is "four hundred eighty-six million, eight hundred thirteen thousand, seven hundred eighty-one".