681488071 has 8 divisors (see below), whose sum is σ = 743644944. Its totient is φ = 619365120.

The previous prime is 681488047. The next prime is 681488083. The reversal of 681488071 is 170884186.

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

It is not a de Polignac number, because 681488071 - 2⁷ = 681487943 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 (681488771) 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, 52855 + ... + 64471.

It is an arithmetic number, because the mean of its divisors is an integer number (92955618).

Almost surely, 2^681488071 is an apocalyptic number.

681488071 is a deficient number, since it is larger than the sum of its proper divisors (62156873).

681488071 is a wasteful number, since it uses less digits than its factorization.

681488071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16961.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 681488071 is about 26105.3264871367. The cubic root of 681488071 is about 880.0069175593.

The spelling of 681488071 in words is "six hundred eighty-one million, four hundred eighty-eight thousand, seventy-one".