253868129 has 2 divisors, whose sum is σ = 253868130. Its totient is φ = 253868128.

The previous prime is 253868107. The next prime is 253868149. The reversal of 253868129 is 921868352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127080529 + 126787600 = 11273^2 + 11260^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253868129 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253868129.

It is not a weakly prime, because it can be changed into another prime (253868149) 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, 126934064 + 126934065.

It is an arithmetic number, because the mean of its divisors is an integer number (126934065).

Almost surely, 2^253868129 is an apocalyptic number.

It is an amenable number.

253868129 is a deficient number, since it is larger than the sum of its proper divisors (1).

253868129 is an equidigital number, since it uses as much as digits as its factorization.

253868129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 253868129 is about 15933.2397521659. The cubic root of 253868129 is about 633.1929354223.

The spelling of 253868129 in words is "two hundred fifty-three million, eight hundred sixty-eight thousand, one hundred twenty-nine".