681003871 has 8 divisors (see below), whose sum is σ = 718980080. Its totient is φ = 643241088.

The previous prime is 681003811. The next prime is 681003887. The reversal of 681003871 is 178300186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681003871 - 2²³ = 672615263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681003811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46776 + ... + 59581.

It is an arithmetic number, because the mean of its divisors is an integer number (89872510).

Almost surely, 2^681003871 is an apocalyptic number.

681003871 is a deficient number, since it is larger than the sum of its proper divisors (37976209).

681003871 is a wasteful number, since it uses less digits than its factorization.

681003871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106713.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 681003871 is about 26096.0508698155. The cubic root of 681003871 is about 879.7984520348.

The spelling of 681003871 in words is "six hundred eighty-one million, three thousand, eight hundred seventy-one".