681422867 has 2 divisors, whose sum is σ = 681422868. Its totient is φ = 681422866.

The previous prime is 681422857. The next prime is 681422879. The reversal of 681422867 is 768224186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681422867 - 2⁴ = 681422851 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681422857) 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, 340711433 + 340711434.

It is an arithmetic number, because the mean of its divisors is an integer number (340711434).

Almost surely, 2^681422867 is an apocalyptic number.

681422867 is a deficient number, since it is larger than the sum of its proper divisors (1).

681422867 is an equidigital number, since it uses as much as digits as its factorization.

681422867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 681422867 is about 26104.0775933569. The cubic root of 681422867 is about 879.9788506453.

The spelling of 681422867 in words is "six hundred eighty-one million, four hundred twenty-two thousand, eight hundred sixty-seven".