681897338 has 16 divisors (see below), whose sum is σ = 1062322560. Its totient is φ = 328035936.

The previous prime is 681897323. The next prime is 681897341. The reversal of 681897338 is 833798186.

It is a self number, because there is not a number n which added to its sum of digits gives 681897338.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55931 + ... + 67022.

It is an arithmetic number, because the mean of its divisors is an integer number (66395160).

Almost surely, 2^681897338 is an apocalyptic number.

681897338 is a deficient number, since it is larger than the sum of its proper divisors (380425222).

681897338 is a wasteful number, since it uses less digits than its factorization.

681897338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123061.

The product of its digits is 1741824, while the sum is 53.

The square root of 681897338 is about 26113.1640748493. The cubic root of 681897338 is about 880.1830447399.

The spelling of 681897338 in words is "six hundred eighty-one million, eight hundred ninety-seven thousand, three hundred thirty-eight".