681020338 has 12 divisors (see below), whose sum is σ = 1055549070. Its totient is φ = 329525040.

The previous prime is 681020297. The next prime is 681020341. The reversal of 681020338 is 833020186.

681020338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 650913169 + 30107169 = 25513^2 + 5487^2 .

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175243 + ... + 179086.

Almost surely, 2^681020338 is an apocalyptic number.

681020338 is a deficient number, since it is larger than the sum of its proper divisors (374528732).

681020338 is a wasteful number, since it uses less digits than its factorization.

681020338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354393 (or 354362 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 681020338 is about 26096.3663754171. The cubic root of 681020338 is about 879.8055432937.

The spelling of 681020338 in words is "six hundred eighty-one million, twenty thousand, three hundred thirty-eight".