681044338 has 8 divisors (see below), whose sum is σ = 1100148588. Its totient is φ = 314328144.

The previous prime is 681044297. The next prime is 681044359. The reversal of 681044338 is 833440186.

It can be written as a sum of positive squares in 2 ways, for example, as 650607049 + 30437289 = 25507^2 + 5517^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 681044297 and 681044306.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13096981 + ... + 13097032.

Almost surely, 2^681044338 is an apocalyptic number.

681044338 is a deficient number, since it is larger than the sum of its proper divisors (419104250).

681044338 is a wasteful number, since it uses less digits than its factorization.

681044338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26194028.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 681044338 is about 26096.8262054986. The cubic root of 681044338 is about 879.8158783179.

The spelling of 681044338 in words is "six hundred eighty-one million, forty-four thousand, three hundred thirty-eight".