252691729 has 2 divisors, whose sum is σ = 252691730. Its totient is φ = 252691728.

The previous prime is 252691727. The next prime is 252691771. The reversal of 252691729 is 927196252.

252691729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251952129 + 739600 = 15873^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 252691729 - 2¹ = 252691727 is a prime.

Together with 252691727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (252691721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126345864 + 126345865.

It is an arithmetic number, because the mean of its divisors is an integer number (126345865).

Almost surely, 2^252691729 is an apocalyptic number.

It is an amenable number.

252691729 is a deficient number, since it is larger than the sum of its proper divisors (1).

252691729 is an equidigital number, since it uses as much as digits as its factorization.

252691729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 252691729 is about 15896.2803510758. The cubic root of 252691729 is about 632.2133694787.

The spelling of 252691729 in words is "two hundred fifty-two million, six hundred ninety-one thousand, seven hundred twenty-nine".