686388083 has 2 divisors, whose sum is σ = 686388084. Its totient is φ = 686388082.

The previous prime is 686388067. The next prime is 686388113. The reversal of 686388083 is 380883686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 686388083 - 2⁴ = 686388067 is a prime.

It is a super-2 number, since 2×686388083² = 942257200968829778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (686388013) 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, 343194041 + 343194042.

It is an arithmetic number, because the mean of its divisors is an integer number (343194042).

Almost surely, 2^686388083 is an apocalyptic number.

686388083 is a deficient number, since it is larger than the sum of its proper divisors (1).

686388083 is an equidigital number, since it uses as much as digits as its factorization.

686388083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 686388083 is about 26199.0091988228. The cubic root of 686388083 is about 882.1110144388. Note that the first 3 decimals are identical.

The spelling of 686388083 in words is "six hundred eighty-six million, three hundred eighty-eight thousand, eighty-three".