252688439 has 2 divisors, whose sum is σ = 252688440. Its totient is φ = 252688438.

The previous prime is 252688427. The next prime is 252688451. The reversal of 252688439 is 934886252.

It is a balanced prime because it is at equal distance from previous prime (252688427) and next prime (252688451).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252688439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 252688393 and 252688402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252688039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126344219 + 126344220.

It is an arithmetic number, because the mean of its divisors is an integer number (126344220).

Almost surely, 2^252688439 is an apocalyptic number.

252688439 is a deficient number, since it is larger than the sum of its proper divisors (1).

252688439 is an equidigital number, since it uses as much as digits as its factorization.

252688439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 47.

The square root of 252688439 is about 15896.1768674106. The cubic root of 252688439 is about 632.2106256994.

The spelling of 252688439 in words is "two hundred fifty-two million, six hundred eighty-eight thousand, four hundred thirty-nine".