686486833 has 2 divisors, whose sum is σ = 686486834. Its totient is φ = 686486832.

The previous prime is 686486831. The next prime is 686486837. The reversal of 686486833 is 338684686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677196529 + 9290304 = 26023^2 + 3048^2 .

It is a cyclic number.

It is not a de Polignac number, because 686486833 - 2¹ = 686486831 is a prime.

Together with 686486831, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (686486831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343243416 + 343243417.

It is an arithmetic number, because the mean of its divisors is an integer number (343243417).

Almost surely, 2^686486833 is an apocalyptic number.

It is an amenable number.

686486833 is a deficient number, since it is larger than the sum of its proper divisors (1).

686486833 is an equidigital number, since it uses as much as digits as its factorization.

686486833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 52.

The square root of 686486833 is about 26200.8937442981. The cubic root of 686486833 is about 882.1533152342.

The spelling of 686486833 in words is "six hundred eighty-six million, four hundred eighty-six thousand, eight hundred thirty-three".