681065041 has 4 divisors (see below), whose sum is σ = 682275312. Its totient is φ = 679854772.

The previous prime is 681065023. The next prime is 681065053. The reversal of 681065041 is 140560186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681065041 - 2⁹ = 681064529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681064994 and 681065012.

It is not an unprimeable number, because it can be changed into a prime (681065141) 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, 604291 + ... + 605416.

It is an arithmetic number, because the mean of its divisors is an integer number (170568828).

Almost surely, 2^681065041 is an apocalyptic number.

It is an amenable number.

681065041 is a deficient number, since it is larger than the sum of its proper divisors (1210271).

681065041 is a wasteful number, since it uses less digits than its factorization.

681065041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210270.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 681065041 is about 26097.2228599137. Note that the first 3 decimals coincide. The cubic root of 681065041 is about 879.8247933731.

The spelling of 681065041 in words is "six hundred eighty-one million, sixty-five thousand, forty-one".