681896799 has 20 divisors (see below), whose sum is σ = 1022295120. Its totient is φ = 452964960.

The previous prime is 681896797. The next prime is 681896819. The reversal of 681896799 is 997698186.

It is not a de Polignac number, because 681896799 - 2¹ = 681896797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681896797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7782 + ... + 37740.

It is an arithmetic number, because the mean of its divisors is an integer number (51114756).

Almost surely, 2^681896799 is an apocalyptic number.

681896799 is a deficient number, since it is larger than the sum of its proper divisors (340398321).

681896799 is a wasteful number, since it uses less digits than its factorization.

681896799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30252 (or 30243 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 681896799 is about 26113.1537543821. The cubic root of 681896799 is about 880.1828128287.

The spelling of 681896799 in words is "six hundred eighty-one million, eight hundred ninety-six thousand, seven hundred ninety-nine".