681241173 has 4 divisors (see below), whose sum is σ = 908321568. Its totient is φ = 454160780.

The previous prime is 681241147. The next prime is 681241177. The reversal of 681241173 is 371142186.

681241173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681241173 - 2⁶ = 681241109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681241177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113540193 + ... + 113540198.

It is an arithmetic number, because the mean of its divisors is an integer number (227080392).

Almost surely, 2^681241173 is an apocalyptic number.

It is an amenable number.

681241173 is a deficient number, since it is larger than the sum of its proper divisors (227080395).

681241173 is a wasteful number, since it uses less digits than its factorization.

681241173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227080394.

The product of its digits is 8064, while the sum is 33.

The square root of 681241173 is about 26100.5971770762. The cubic root of 681241173 is about 879.9006314279.

The spelling of 681241173 in words is "six hundred eighty-one million, two hundred forty-one thousand, one hundred seventy-three".