681883867 has 4 divisors (see below), whose sum is σ = 779295856. Its totient is φ = 584471880.

The previous prime is 681883859. The next prime is 681883871. The reversal of 681883867 is 768388186.

681883867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681883867 - 2³ = 681883859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681883877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48705984 + ... + 48705997.

It is an arithmetic number, because the mean of its divisors is an integer number (194823964).

Almost surely, 2^681883867 is an apocalyptic number.

681883867 is a deficient number, since it is larger than the sum of its proper divisors (97411989).

681883867 is an equidigital number, since it uses as much as digits as its factorization.

681883867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97411988.

The product of its digits is 3096576, while the sum is 55.

The square root of 681883867 is about 26112.9061385362. The cubic root of 681883867 is about 880.1772486455.

The spelling of 681883867 in words is "six hundred eighty-one million, eight hundred eighty-three thousand, eight hundred sixty-seven".