681875843 has 16 divisors (see below), whose sum is σ = 749952000. Its totient is φ = 614839680.

The previous prime is 681875839. The next prime is 681875861. The reversal of 681875843 is 348578186.

It is a cyclic number.

It is not a de Polignac number, because 681875843 - 2² = 681875839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681875791 and 681875800.

It is not an unprimeable number, because it can be changed into a prime (681875813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138058 + ... + 1138656.

It is an arithmetic number, because the mean of its divisors is an integer number (46872000).

Almost surely, 2^681875843 is an apocalyptic number.

681875843 is a deficient number, since it is larger than the sum of its proper divisors (68076157).

681875843 is a wasteful number, since it uses less digits than its factorization.

681875843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282.

The product of its digits is 1290240, while the sum is 50.

The square root of 681875843 is about 26112.7524975825. The cubic root of 681875843 is about 880.1737961662.

The spelling of 681875843 in words is "six hundred eighty-one million, eight hundred seventy-five thousand, eight hundred forty-three".