681306375 has 64 divisors (see below), whose sum is σ = 1183703040. Its totient is φ = 347616000.

The previous prime is 681306341. The next prime is 681306383. The reversal of 681306375 is 573603186.

681306375 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 681306375 - 2¹⁷ = 681175303 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1197091 + ... + 1197659.

It is an arithmetic number, because the mean of its divisors is an integer number (18495360).

Almost surely, 2^681306375 is an apocalyptic number.

681306375 is a deficient number, since it is larger than the sum of its proper divisors (502396665).

681306375 is a wasteful number, since it uses less digits than its factorization.

681306375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 681306375 is about 26101.8461990718. The cubic root of 681306375 is about 879.9287024709.

The spelling of 681306375 in words is "six hundred eighty-one million, three hundred six thousand, three hundred seventy-five".