681108767 has 2 divisors, whose sum is σ = 681108768. Its totient is φ = 681108766.

The previous prime is 681108763. The next prime is 681108787. The reversal of 681108767 is 767801186.

681108767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681108767 - 2² = 681108763 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681108763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340554383 + 340554384.

It is an arithmetic number, because the mean of its divisors is an integer number (340554384).

Almost surely, 2^681108767 is an apocalyptic number.

681108767 is a deficient number, since it is larger than the sum of its proper divisors (1).

681108767 is an equidigital number, since it uses as much as digits as its factorization.

681108767 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 681108767 is about 26098.0605984429. The cubic root of 681108767 is about 879.8436219202.

The spelling of 681108767 in words is "six hundred eighty-one million, one hundred eight thousand, seven hundred sixty-seven".