686041672697 has 4 divisors (see below), whose sum is σ = 689874307920. Its totient is φ = 682209037476.

The previous prime is 686041672691. The next prime is 686041672733. The reversal of 686041672697 is 796276140686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 686041672697 - 2⁸ = 686041672441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686041672691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1916317343 + ... + 1916317700.

It is an arithmetic number, because the mean of its divisors is an integer number (172468576980).

Almost surely, 2^686041672697 is an apocalyptic number.

It is an amenable number.

686041672697 is a deficient number, since it is larger than the sum of its proper divisors (3832635223).

686041672697 is a wasteful number, since it uses less digits than its factorization.

686041672697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3832635222.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 686041672697 in words is "six hundred eighty-six billion, forty-one million, six hundred seventy-two thousand, six hundred ninety-seven".