681132205 has 8 divisors (see below), whose sum is σ = 880232472. Its totient is φ = 502989888.

The previous prime is 681132191. The next prime is 681132211. The reversal of 681132205 is 502231186.

It can be written as a sum of positive squares in 4 ways, for example, as 14356521 + 666775684 = 3789^2 + 25822^2 .

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 681132205 - 2⁵ = 681132173 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 5239414 + ... + 5239543.

It is an arithmetic number, because the mean of its divisors is an integer number (110029059).

Almost surely, 2^681132205 is an apocalyptic number.

681132205 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

681132205 is a deficient number, since it is larger than the sum of its proper divisors (199100267).

681132205 is a wasteful number, since it uses less digits than its factorization.

681132205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10478975.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 681132205 is about 26098.5096317778. The cubic root of 681132205 is about 879.8537140617.

The spelling of 681132205 in words is "six hundred eighty-one million, one hundred thirty-two thousand, two hundred five".