681676009 has 8 divisors (see below), whose sum is σ = 787812480. Its totient is φ = 577728096.

The previous prime is 681676007. The next prime is 681676027. The reversal of 681676009 is 900676186.

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 681676009 - 2¹ = 681676007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681676007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546469 + ... + 547714.

It is an arithmetic number, because the mean of its divisors is an integer number (98476560).

Almost surely, 2^681676009 is an apocalyptic number.

It is an amenable number.

681676009 is a deficient number, since it is larger than the sum of its proper divisors (106136471).

681676009 is a wasteful number, since it uses less digits than its factorization.

681676009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094279.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 681676009 is about 26108.9258492187. The cubic root of 681676009 is about 880.0878050300.

The spelling of 681676009 in words is "six hundred eighty-one million, six hundred seventy-six thousand, nine".