681525703 has 2 divisors, whose sum is σ = 681525704. Its totient is φ = 681525702.

The previous prime is 681525701. The next prime is 681525721. The reversal of 681525703 is 307525186.

681525703 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 681525703 - 2¹ = 681525701 is a prime.

Together with 681525701, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681525701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340762851 + 340762852.

It is an arithmetic number, because the mean of its divisors is an integer number (340762852).

Almost surely, 2^681525703 is an apocalyptic number.

681525703 is a deficient number, since it is larger than the sum of its proper divisors (1).

681525703 is an equidigital number, since it uses as much as digits as its factorization.

681525703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 681525703 is about 26106.0472496316. The cubic root of 681525703 is about 880.0231153536.

The spelling of 681525703 in words is "six hundred eighty-one million, five hundred twenty-five thousand, seven hundred three".