681108763 has 2 divisors, whose sum is σ = 681108764. Its totient is φ = 681108762.

The previous prime is 681108709. The next prime is 681108767. The reversal of 681108763 is 367801186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681108763 - 2⁹ = 681108251 is a prime.

It is not a weakly prime, because it can be changed into another prime (681108767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340554381 + 340554382.

It is an arithmetic number, because the mean of its divisors is an integer number (340554382).

Almost surely, 2^681108763 is an apocalyptic number.

681108763 is a deficient number, since it is larger than the sum of its proper divisors (1).

681108763 is an equidigital number, since it uses as much as digits as its factorization.

681108763 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 681108763 is about 26098.0605218089. The cubic root of 681108763 is about 879.8436201978.

The spelling of 681108763 in words is "six hundred eighty-one million, one hundred eight thousand, seven hundred sixty-three".