52686209 has 2 divisors, whose sum is σ = 52686210. Its totient is φ = 52686208.

The previous prime is 52686191. The next prime is 52686211. The reversal of 52686209 is 90268625.

52686209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52243984 + 442225 = 7228^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 52686209 - 2²⁰ = 51637633 is a prime.

Together with 52686211, 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 (52686239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26343104 + 26343105.

It is an arithmetic number, because the mean of its divisors is an integer number (26343105).

Almost surely, 2^52686209 is an apocalyptic number.

It is an amenable number.

52686209 is a deficient number, since it is larger than the sum of its proper divisors (1).

52686209 is an equidigital number, since it uses as much as digits as its factorization.

52686209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 52686209 is about 7258.5266411304. The cubic root of 52686209 is about 374.8857939629.

The spelling of 52686209 in words is "fifty-two million, six hundred eighty-six thousand, two hundred nine".