681293294 has 32 divisors (see below), whose sum is σ = 1149797376. Its totient is φ = 300100320.

The previous prime is 681293287. The next prime is 681293297. The reversal of 681293294 is 492392186.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681293297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103304 + ... + 109700.

It is an arithmetic number, because the mean of its divisors is an integer number (35931168).

Almost surely, 2^681293294 is an apocalyptic number.

681293294 is a deficient number, since it is larger than the sum of its proper divisors (468504082).

681293294 is a wasteful number, since it uses less digits than its factorization.

681293294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560.

The product of its digits is 186624, while the sum is 44.

The square root of 681293294 is about 26101.5956217240. The cubic root of 681293294 is about 879.9230709266.

The spelling of 681293294 in words is "six hundred eighty-one million, two hundred ninety-three thousand, two hundred ninety-four".