685807992697 has 8 divisors (see below), whose sum is σ = 698499938880. Its totient is φ = 673151649360.

The previous prime is 685807992677. The next prime is 685807992703. The reversal of 685807992697 is 796299708586.

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 685807992697 - 2¹¹ = 685807990649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685807992637) 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, 8861829 + ... + 8938882.

It is an arithmetic number, because the mean of its divisors is an integer number (87312492360).

Almost surely, 2^685807992697 is an apocalyptic number.

It is an amenable number.

685807992697 is a deficient number, since it is larger than the sum of its proper divisors (12691946183).

685807992697 is a wasteful number, since it uses less digits than its factorization.

685807992697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17801423.

The product of its (nonzero) digits is 823011840, while the sum is 76.

The spelling of 685807992697 in words is "six hundred eighty-five billion, eight hundred seven million, nine hundred ninety-two thousand, six hundred ninety-seven".