686067647 has 8 divisors (see below), whose sum is σ = 688457520. Its totient is φ = 683683200.

The previous prime is 686067631. The next prime is 686067673. The reversal of 686067647 is 746760686.

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 686067647 - 2⁴ = 686067631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686067595 and 686067604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686067617) 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, 570647 + ... + 571847.

It is an arithmetic number, because the mean of its divisors is an integer number (86057190).

Almost surely, 2^686067647 is an apocalyptic number.

686067647 is a deficient number, since it is larger than the sum of its proper divisors (2389873).

686067647 is a wasteful number, since it uses less digits than its factorization.

686067647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The square root of 686067647 is about 26192.8930628138. The cubic root of 686067647 is about 881.9737237284.

The spelling of 686067647 in words is "six hundred eighty-six million, sixty-seven thousand, six hundred forty-seven".