681047 has 2 divisors, whose sum is σ = 681048. Its totient is φ = 681046.

The previous prime is 681041. The next prime is 681049. The reversal of 681047 is 740186.

681047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681047 - 2¹⁴ = 664663 is a prime.

Together with 681049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340523 + 340524.

It is an arithmetic number, because the mean of its divisors is an integer number (340524).

2⁶⁸¹⁰⁴⁷ is an apocalyptic number.

681047 is a deficient number, since it is larger than the sum of its proper divisors (1).

681047 is an equidigital number, since it uses as much as digits as its factorization.

681047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 681047 is about 825.2557179444. The cubic root of 681047 is about 87.9817024629.

The spelling of 681047 in words is "six hundred eighty-one thousand, forty-seven".