681143924 has 12 divisors (see below), whose sum is σ = 1200578400. Its totient is φ = 338121528.

The previous prime is 681143891. The next prime is 681143929. The reversal of 681143924 is 429341186.

681143924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681143929) 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, 611984 + ... + 613095.

It is an arithmetic number, because the mean of its divisors is an integer number (100048200).

Almost surely, 2^681143924 is an apocalyptic number.

It is an amenable number.

681143924 is a deficient number, since it is larger than the sum of its proper divisors (519434476).

681143924 is a wasteful number, since it uses less digits than its factorization.

681143924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225222 (or 1225220 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 681143924 is about 26098.7341455481. The cubic root of 681143924 is about 879.8587600457.

The spelling of 681143924 in words is "six hundred eighty-one million, one hundred forty-three thousand, nine hundred twenty-four".