252427709 has 2 divisors, whose sum is σ = 252427710. Its totient is φ = 252427708.

The previous prime is 252427667. The next prime is 252427729. The reversal of 252427709 is 907724252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155700484 + 96727225 = 12478^2 + 9835^2 .

It is a cyclic number.

It is not a de Polignac number, because 252427709 - 2⁸ = 252427453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252427729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126213854 + 126213855.

It is an arithmetic number, because the mean of its divisors is an integer number (126213855).

Almost surely, 2^252427709 is an apocalyptic number.

It is an amenable number.

252427709 is a deficient number, since it is larger than the sum of its proper divisors (1).

252427709 is an equidigital number, since it uses as much as digits as its factorization.

252427709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 252427709 is about 15887.9737222844. The cubic root of 252427709 is about 631.9931074997.

The spelling of 252427709 in words is "two hundred fifty-two million, four hundred twenty-seven thousand, seven hundred nine".