686353331 has 2 divisors, whose sum is σ = 686353332. Its totient is φ = 686353330.

The previous prime is 686353307. The next prime is 686353333. The reversal of 686353331 is 133353686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 686353331 - 2¹⁴ = 686336947 is a prime.

It is a super-2 number, since 2×686353331² = 942161789949591122, which contains 22 as substring.

Together with 686353333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (686353333) 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, 343176665 + 343176666.

It is an arithmetic number, because the mean of its divisors is an integer number (343176666).

Almost surely, 2^686353331 is an apocalyptic number.

686353331 is a deficient number, since it is larger than the sum of its proper divisors (1).

686353331 is an equidigital number, since it uses as much as digits as its factorization.

686353331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 38.

The square root of 686353331 is about 26198.3459592395. The cubic root of 686353331 is about 882.0961270205.

The spelling of 686353331 in words is "six hundred eighty-six million, three hundred fifty-three thousand, three hundred thirty-one".