681346807 has 8 divisors (see below), whose sum is σ = 689244192. Its totient is φ = 673495200.

The previous prime is 681346769. The next prime is 681346811. The reversal of 681346807 is 708643186.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681346807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681346817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18957 + ... + 41497.

It is an arithmetic number, because the mean of its divisors is an integer number (86155524).

Almost surely, 2^681346807 is an apocalyptic number.

681346807 is a deficient number, since it is larger than the sum of its proper divisors (7897385).

681346807 is a wasteful number, since it uses less digits than its factorization.

681346807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22889.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 681346807 is about 26102.6206921834. The cubic root of 681346807 is about 879.9461085282.

The spelling of 681346807 in words is "six hundred eighty-one million, three hundred forty-six thousand, eight hundred seven".