681926041 has 4 divisors (see below), whose sum is σ = 682722612. Its totient is φ = 681129472.

The previous prime is 681926027. The next prime is 681926053. The reversal of 681926041 is 140629186.

It is a happy number.

681926041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 140629186 = 2 ⋅70314593.

It can be written as a sum of positive squares in 2 ways, for example, as 667705600 + 14220441 = 25840^2 + 3771^2 .

It is a cyclic number.

It is not a de Polignac number, because 681926041 - 2⁹ = 681925529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681926081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397000 + ... + 398713.

It is an arithmetic number, because the mean of its divisors is an integer number (170680653).

Almost surely, 2^681926041 is an apocalyptic number.

It is an amenable number.

681926041 is a deficient number, since it is larger than the sum of its proper divisors (796571).

681926041 is an equidigital number, since it uses as much as digits as its factorization.

681926041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796570.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 681926041 is about 26113.7136577699. The cubic root of 681926041 is about 880.1953943699.

The spelling of 681926041 in words is "six hundred eighty-one million, nine hundred twenty-six thousand, forty-one".