53303209 has 2 divisors, whose sum is σ = 53303210. Its totient is φ = 53303208.

The previous prime is 53303207. The next prime is 53303249. The reversal of 53303209 is 90230335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45265984 + 8037225 = 6728^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 53303209 - 2¹ = 53303207 is a prime.

Together with 53303207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53303207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26651604 + 26651605.

It is an arithmetic number, because the mean of its divisors is an integer number (26651605).

Almost surely, 2^53303209 is an apocalyptic number.

It is an amenable number.

53303209 is a deficient number, since it is larger than the sum of its proper divisors (1).

53303209 is an equidigital number, since it uses as much as digits as its factorization.

53303209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 25.

The square root of 53303209 is about 7300.9046699707. The cubic root of 53303209 is about 376.3435279975.

The spelling of 53303209 in words is "fifty-three million, three hundred three thousand, two hundred nine".