681800827 has 8 divisors (see below), whose sum is σ = 722231856. Its totient is φ = 641405952.

The previous prime is 681800789. The next prime is 681800831. The reversal of 681800827 is 728008186.

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

It is a cyclic number.

It is not a de Polignac number, because 681800827 - 2¹⁹ = 681276539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681800827.

It is not an unprimeable number, because it can be changed into a prime (681800857) 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, 36348 + ... + 51814.

It is an arithmetic number, because the mean of its divisors is an integer number (90278982).

Almost surely, 2^681800827 is an apocalyptic number.

681800827 is a deficient number, since it is larger than the sum of its proper divisors (40431029).

681800827 is a wasteful number, since it uses less digits than its factorization.

681800827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18077.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 681800827 is about 26111.3160717724. The cubic root of 681800827 is about 880.1415177880.

The spelling of 681800827 in words is "six hundred eighty-one million, eight hundred thousand, eight hundred twenty-seven".