253705009 has 2 divisors, whose sum is σ = 253705010. Its totient is φ = 253705008.

The previous prime is 253704977. The next prime is 253705033. The reversal of 253705009 is 900507352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176757025 + 76947984 = 13295^2 + 8772^2 .

It is a cyclic number.

It is not a de Polignac number, because 253705009 - 2⁵ = 253704977 is a prime.

It is not a weakly prime, because it can be changed into another prime (253705409) 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, 126852504 + 126852505.

It is an arithmetic number, because the mean of its divisors is an integer number (126852505).

Almost surely, 2^253705009 is an apocalyptic number.

It is an amenable number.

253705009 is a deficient number, since it is larger than the sum of its proper divisors (1).

253705009 is an equidigital number, since it uses as much as digits as its factorization.

253705009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 253705009 is about 15928.1200711195. The cubic root of 253705009 is about 633.0572894582.

The spelling of 253705009 in words is "two hundred fifty-three million, seven hundred five thousand, nine".