686930206 has 4 divisors (see below), whose sum is σ = 1030395312. Its totient is φ = 343465102.

The previous prime is 686930177. The next prime is 686930207. The reversal of 686930206 is 602039686.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686930207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171732550 + ... + 171732553.

It is an arithmetic number, because the mean of its divisors is an integer number (257598828).

Almost surely, 2^686930206 is an apocalyptic number.

686930206 is a deficient number, since it is larger than the sum of its proper divisors (343465106).

686930206 is a wasteful number, since it uses less digits than its factorization.

686930206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343465105.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 686930206 is about 26209.3534067516. The cubic root of 686930206 is about 882.3431896158.

The spelling of 686930206 in words is "six hundred eighty-six million, nine hundred thirty thousand, two hundred six".