686115061 has 4 divisors (see below), whose sum is σ = 722226400. Its totient is φ = 650003724.

The previous prime is 686115049. The next prime is 686115077. The reversal of 686115061 is 160511686.

686115061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 686115061 - 2⁵ = 686115029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686115761) 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, 18055641 + ... + 18055678.

It is an arithmetic number, because the mean of its divisors is an integer number (180556600).

Almost surely, 2^686115061 is an apocalyptic number.

It is an amenable number.

686115061 is a deficient number, since it is larger than the sum of its proper divisors (36111339).

686115061 is a wasteful number, since it uses less digits than its factorization.

686115061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36111338.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 686115061 is about 26193.7981400178. The cubic root of 686115061 is about 881.9940409372.

The spelling of 686115061 in words is "six hundred eighty-six million, one hundred fifteen thousand, sixty-one".