863281673 has 2 divisors, whose sum is σ = 863281674. Its totient is φ = 863281672.

The previous prime is 863281633. The next prime is 863281697. The reversal of 863281673 is 376182368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772117369 + 91164304 = 27787^2 + 9548^2 .

It is a cyclic number.

It is not a de Polignac number, because 863281673 - 2¹² = 863277577 is a prime.

It is not a weakly prime, because it can be changed into another prime (863281633) 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, 431640836 + 431640837.

It is an arithmetic number, because the mean of its divisors is an integer number (431640837).

Almost surely, 2^863281673 is an apocalyptic number.

It is an amenable number.

863281673 is a deficient number, since it is larger than the sum of its proper divisors (1).

863281673 is an equidigital number, since it uses as much as digits as its factorization.

863281673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 44.

The square root of 863281673 is about 29381.6553822279. The cubic root of 863281673 is about 952.1766059059.

The spelling of 863281673 in words is "eight hundred sixty-three million, two hundred eighty-one thousand, six hundred seventy-three".