686930207 has 2 divisors, whose sum is σ = 686930208. Its totient is φ = 686930206.

The previous prime is 686930177. The next prime is 686930261. The reversal of 686930207 is 702039686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686930207 - 2²² = 682735903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686930287) by changing a digit.

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 as a sum of consecutive naturals, namely, 343465103 + 343465104.

It is an arithmetic number, because the mean of its divisors is an integer number (343465104).

Almost surely, 2^686930207 is an apocalyptic number.

686930207 is a deficient number, since it is larger than the sum of its proper divisors (1).

686930207 is an equidigital number, since it uses as much as digits as its factorization.

686930207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 686930207 is about 26209.3534258287. The cubic root of 686930207 is about 882.3431900440.

The spelling of 686930207 in words is "six hundred eighty-six million, nine hundred thirty thousand, two hundred seven".