53667209 has 2 divisors, whose sum is σ = 53667210. Its totient is φ = 53667208.

The previous prime is 53667199. The next prime is 53667227. The reversal of 53667209 is 90276635.

53667209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 595984 = 7285^2 + 772^2 .

It is a cyclic number.

It is not a de Polignac number, because 53667209 - 2⁴ = 53667193 is a prime.

It is not a weakly prime, because it can be changed into another prime (53667239) 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, 26833604 + 26833605.

It is an arithmetic number, because the mean of its divisors is an integer number (26833605).

Almost surely, 2^53667209 is an apocalyptic number.

It is an amenable number.

53667209 is a deficient number, since it is larger than the sum of its proper divisors (1).

53667209 is an equidigital number, since it uses as much as digits as its factorization.

53667209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 38.

The square root of 53667209 is about 7325.7906740501. The cubic root of 53667209 is about 377.1982507443.

The spelling of 53667209 in words is "fifty-three million, six hundred sixty-seven thousand, two hundred nine".