252603809 has 2 divisors, whose sum is σ = 252603810. Its totient is φ = 252603808.

The previous prime is 252603749. The next prime is 252603821. The reversal of 252603809 is 908306252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189750625 + 62853184 = 13775^2 + 7928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252603809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252603899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126301904 + 126301905.

It is an arithmetic number, because the mean of its divisors is an integer number (126301905).

Almost surely, 2^252603809 is an apocalyptic number.

It is an amenable number.

252603809 is a deficient number, since it is larger than the sum of its proper divisors (1).

252603809 is an equidigital number, since it uses as much as digits as its factorization.

252603809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 252603809 is about 15893.5146836689. The cubic root of 252603809 is about 632.1400381678.

The spelling of 252603809 in words is "two hundred fifty-two million, six hundred three thousand, eight hundred nine".