681065023 has 2 divisors, whose sum is σ = 681065024. Its totient is φ = 681065022.

The previous prime is 681065017. The next prime is 681065053. The reversal of 681065023 is 320560186.

681065023 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 681065023 - 2²⁹ = 144194111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681065053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340532511 + 340532512.

It is an arithmetic number, because the mean of its divisors is an integer number (340532512).

Almost surely, 2^681065023 is an apocalyptic number.

681065023 is a deficient number, since it is larger than the sum of its proper divisors (1).

681065023 is an equidigital number, since it uses as much as digits as its factorization.

681065023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 681065023 is about 26097.2225150494. Note that the first 3 decimals coincide. The cubic root of 681065023 is about 879.8247856221.

The spelling of 681065023 in words is "six hundred eighty-one million, sixty-five thousand, twenty-three".