681487307 has 8 divisors (see below), whose sum is σ = 717596160. Its totient is φ = 645402600.

The previous prime is 681487297. The next prime is 681487319. The reversal of 681487307 is 703784186.

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 681487307 - 2¹² = 681483211 is a prime.

It is a super-2 number, since 2×681487307² = 928849899204224498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681487337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98318 + ... + 105020.

It is an arithmetic number, because the mean of its divisors is an integer number (89699520).

Almost surely, 2^681487307 is an apocalyptic number.

681487307 is a deficient number, since it is larger than the sum of its proper divisors (36108853).

681487307 is a wasteful number, since it uses less digits than its factorization.

681487307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12073.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 681487307 is about 26105.3118541036. The cubic root of 681487307 is about 880.0065887076.

The spelling of 681487307 in words is "six hundred eighty-one million, four hundred eighty-seven thousand, three hundred seven".