681848217 has 12 divisors (see below), whose sum is σ = 985580544. Its totient is φ = 454247640.

The previous prime is 681848107. The next prime is 681848221. The reversal of 681848217 is 712848186.

It is not a de Polignac number, because 681848217 - 2¹⁰ = 681847193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681848267) 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 in 11 ways as a sum of consecutive naturals, for example, 12513 + ... + 38990.

It is an arithmetic number, because the mean of its divisors is an integer number (82131712).

Almost surely, 2^681848217 is an apocalyptic number.

It is an amenable number.

681848217 is a deficient number, since it is larger than the sum of its proper divisors (303732327).

681848217 is a wasteful number, since it uses less digits than its factorization.

681848217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52980 (or 52977 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 681848217 is about 26112.2235169661. The cubic root of 681848217 is about 880.1619093445.

The spelling of 681848217 in words is "six hundred eighty-one million, eight hundred forty-eight thousand, two hundred seventeen".