684867470717 has 8 divisors (see below), whose sum is σ = 703406425656. Its totient is φ = 666330043392.

The previous prime is 684867470699. The next prime is 684867470723. The reversal of 684867470717 is 717074768486.

It can be written as a sum of positive squares in 4 ways, for example, as 169442549956 + 515424920761 = 411634^2 + 717931^2 .

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 684867470717 - 2⁶ = 684867470653 is a prime.

It is a super-3 number, since 3×684867470717³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684867470737) 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, 557753 + ... + 1296465.

It is an arithmetic number, because the mean of its divisors is an integer number (87925803207).

Almost surely, 2^684867470717 is an apocalyptic number.

It is an amenable number.

684867470717 is a deficient number, since it is larger than the sum of its proper divisors (18538954939).

684867470717 is a wasteful number, since it uses less digits than its factorization.

684867470717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763807.

The product of its (nonzero) digits is 88510464, while the sum is 65.

The spelling of 684867470717 in words is "six hundred eighty-four billion, eight hundred sixty-seven million, four hundred seventy thousand, seven hundred seventeen".