52406209 has 2 divisors, whose sum is σ = 52406210. Its totient is φ = 52406208.

The previous prime is 52406203. The next prime is 52406227. The reversal of 52406209 is 90260425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39337984 + 13068225 = 6272^2 + 3615^2 .

It is a cyclic number.

It is not a de Polignac number, because 52406209 - 2³ = 52406201 is a prime.

It is not a weakly prime, because it can be changed into another prime (52406201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26203104 + 26203105.

It is an arithmetic number, because the mean of its divisors is an integer number (26203105).

Almost surely, 2^52406209 is an apocalyptic number.

It is an amenable number.

52406209 is a deficient number, since it is larger than the sum of its proper divisors (1).

52406209 is an equidigital number, since it uses as much as digits as its factorization.

52406209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 52406209 is about 7239.2132859863. The cubic root of 52406209 is about 374.2205058634.

It can be divided in two parts, 5240 and 6209, that added together give a square (11449 = 107²).

The spelling of 52406209 in words is "fifty-two million, four hundred six thousand, two hundred nine".