252989717 has 2 divisors, whose sum is σ = 252989718. Its totient is φ = 252989716.

The previous prime is 252989687. The next prime is 252989741. The reversal of 252989717 is 717989252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159112996 + 93876721 = 12614^2 + 9689^2 .

It is a cyclic number.

It is not a de Polignac number, because 252989717 - 2¹⁰ = 252988693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252929717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126494858 + 126494859.

It is an arithmetic number, because the mean of its divisors is an integer number (126494859).

Almost surely, 2^252989717 is an apocalyptic number.

It is an amenable number.

252989717 is a deficient number, since it is larger than the sum of its proper divisors (1).

252989717 is an equidigital number, since it uses as much as digits as its factorization.

252989717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 50.

The square root of 252989717 is about 15905.6504739668. The cubic root of 252989717 is about 632.4617854606.

The spelling of 252989717 in words is "two hundred fifty-two million, nine hundred eighty-nine thousand, seven hundred seventeen".