681748171 has 8 divisors (see below), whose sum is σ = 738294480. Its totient is φ = 625788192.

The previous prime is 681748163. The next prime is 681748181. The reversal of 681748171 is 171847186.

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 681748171 - 2³ = 681748163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681748181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144160 + ... + 148813.

It is an arithmetic number, because the mean of its divisors is an integer number (92286810).

Almost surely, 2^681748171 is an apocalyptic number.

681748171 is a deficient number, since it is larger than the sum of its proper divisors (56546309).

681748171 is a wasteful number, since it uses less digits than its factorization.

681748171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293165.

The product of its digits is 75264, while the sum is 43.

The square root of 681748171 is about 26110.3077538355. The cubic root of 681748171 is about 880.1188592036.

The spelling of 681748171 in words is "six hundred eighty-one million, seven hundred forty-eight thousand, one hundred seventy-one".