681733742 has 8 divisors (see below), whose sum is σ = 1031982600. Its totient is φ = 337739544.

The previous prime is 681733733. The next prime is 681733747. The reversal of 681733742 is 247337186.

681733742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 681733742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681733747) 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, 1563392 + ... + 1563827.

It is an arithmetic number, because the mean of its divisors is an integer number (128997825).

Almost surely, 2^681733742 is an apocalyptic number.

681733742 is a deficient number, since it is larger than the sum of its proper divisors (350248858).

681733742 is a wasteful number, since it uses less digits than its factorization.

681733742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127330.

The product of its digits is 169344, while the sum is 41.

The square root of 681733742 is about 26110.0314438723. The cubic root of 681733742 is about 880.1126500073.

The spelling of 681733742 in words is "six hundred eighty-one million, seven hundred thirty-three thousand, seven hundred forty-two".