686533105 has 4 divisors (see below), whose sum is σ = 823839732. Its totient is φ = 549226480.

The previous prime is 686533097. The next prime is 686533129. The reversal of 686533105 is 501335686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114318864 + 572214241 = 10692^2 + 23921^2 .

It is not a de Polignac number, because 686533105 - 2³ = 686533097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68653306 + ... + 68653315.

It is an arithmetic number, because the mean of its divisors is an integer number (205959933).

Almost surely, 2^686533105 is an apocalyptic number.

It is an amenable number.

686533105 is a deficient number, since it is larger than the sum of its proper divisors (137306627).

686533105 is a wasteful number, since it uses less digits than its factorization.

686533105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137306626.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 686533105 is about 26201.7767527319. The cubic root of 686533105 is about 882.1731350273.

The spelling of 686533105 in words is "six hundred eighty-six million, five hundred thirty-three thousand, one hundred five".