252718909 has 2 divisors, whose sum is σ = 252718910. Its totient is φ = 252718908.

The previous prime is 252718901. The next prime is 252718931. The reversal of 252718909 is 909817252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140422500 + 112296409 = 11850^2 + 10597^2 .

It is a cyclic number.

It is not a de Polignac number, because 252718909 - 2³ = 252718901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252718901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126359454 + 126359455.

It is an arithmetic number, because the mean of its divisors is an integer number (126359455).

Almost surely, 2^252718909 is an apocalyptic number.

It is an amenable number.

252718909 is a deficient number, since it is larger than the sum of its proper divisors (1).

252718909 is an equidigital number, since it uses as much as digits as its factorization.

252718909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 252718909 is about 15897.1352450685. The cubic root of 252718909 is about 632.2360360210.

The spelling of 252718909 in words is "two hundred fifty-two million, seven hundred eighteen thousand, nine hundred nine".