681023787 has 16 divisors (see below), whose sum is σ = 914023680. Its totient is φ = 451029600.

The previous prime is 681023753. The next prime is 681023797. The reversal of 681023787 is 787320186.

681023787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681023787 - 2¹¹ = 681021739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681023797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432712 + ... + 434282.

It is an arithmetic number, because the mean of its divisors is an integer number (57126480).

Almost surely, 2^681023787 is an apocalyptic number.

681023787 is a deficient number, since it is larger than the sum of its proper divisors (232999893).

681023787 is a wasteful number, since it uses less digits than its factorization.

681023787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 681023787 is about 26096.4324573303. The cubic root of 681023787 is about 879.8070285378.

The spelling of 681023787 in words is "six hundred eighty-one million, twenty-three thousand, seven hundred eighty-seven".