681107394 has 32 divisors (see below), whose sum is σ = 1508242176. Its totient is φ = 203314320.

The previous prime is 681107381. The next prime is 681107411. The reversal of 681107394 is 493701186.

681107394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×681107394² = 927814564322942472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72592 + ... + 81435.

It is an arithmetic number, because the mean of its divisors is an integer number (47132568).

Almost surely, 2^681107394 is an apocalyptic number.

681107394 is an abundant number, since it is smaller than the sum of its proper divisors (827134782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681107394 is a wasteful number, since it uses less digits than its factorization.

681107394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154110.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 681107394 is about 26098.0342937931. The cubic root of 681107394 is about 879.8430307145.

The spelling of 681107394 in words is "six hundred eighty-one million, one hundred seven thousand, three hundred ninety-four".