686857061 has 8 divisors (see below), whose sum is σ = 753897504. Its totient is φ = 620583120.

The previous prime is 686857037. The next prime is 686857091. The reversal of 686857061 is 160758686.

686857061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 686857061 - 2¹⁸ = 686594917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686856997 and 686857015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686857091) 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, 189746 + ... + 193331.

It is an arithmetic number, because the mean of its divisors is an integer number (94237188).

Almost surely, 2^686857061 is an apocalyptic number.

It is an amenable number.

686857061 is a deficient number, since it is larger than the sum of its proper divisors (67040443).

686857061 is a wasteful number, since it uses less digits than its factorization.

686857061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383251.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 686857061 is about 26207.9579708149. The cubic root of 686857061 is about 882.3118709156.

The spelling of 686857061 in words is "six hundred eighty-six million, eight hundred fifty-seven thousand, sixty-one".