686130605 has 8 divisors (see below), whose sum is σ = 823515000. Its totient is φ = 548798976.

The previous prime is 686130593. The next prime is 686130607. The reversal of 686130605 is 506031686.

686130605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 186786889 + 499343716 = 13667^2 + 22346^2 .

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 686130605 - 2⁴ = 686130589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686130607) 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, 26021 + ... + 45269.

It is an arithmetic number, because the mean of its divisors is an integer number (102939375).

Almost surely, 2^686130605 is an apocalyptic number.

It is an amenable number.

686130605 is a deficient number, since it is larger than the sum of its proper divisors (137384395).

686130605 is a wasteful number, since it uses less digits than its factorization.

686130605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26383.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 686130605 is about 26194.0948497939. The cubic root of 686130605 is about 882.0007014390. Note that the first 3 decimals are identical.

The spelling of 686130605 in words is "six hundred eighty-six million, one hundred thirty thousand, six hundred five".