252168289 has 2 divisors, whose sum is σ = 252168290. Its totient is φ = 252168288.

The previous prime is 252168233. The next prime is 252168299. The reversal of 252168289 is 982861252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 6932689 = 15660^2 + 2633^2 .

It is a cyclic number.

It is not a de Polignac number, because 252168289 - 2²¹ = 250071137 is a prime.

It is not a weakly prime, because it can be changed into another prime (252168299) 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, 126084144 + 126084145.

It is an arithmetic number, because the mean of its divisors is an integer number (126084145).

Almost surely, 2^252168289 is an apocalyptic number.

It is an amenable number.

252168289 is a deficient number, since it is larger than the sum of its proper divisors (1).

252168289 is an equidigital number, since it uses as much as digits as its factorization.

252168289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 252168289 is about 15879.8075869955. The cubic root of 252168289 is about 631.7765334833.

The spelling of 252168289 in words is "two hundred fifty-two million, one hundred sixty-eight thousand, two hundred eighty-nine".