253520009 has 2 divisors, whose sum is σ = 253520010. Its totient is φ = 253520008.

The previous prime is 253519993. The next prime is 253520023. The reversal of 253520009 is 900025352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158886025 + 94633984 = 12605^2 + 9728^2 .

It is a cyclic number.

It is not a de Polignac number, because 253520009 - 2⁴ = 253519993 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 253520009.

It is not a weakly prime, because it can be changed into another prime (253520039) 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, 126760004 + 126760005.

It is an arithmetic number, because the mean of its divisors is an integer number (126760005).

Almost surely, 2^253520009 is an apocalyptic number.

It is an amenable number.

253520009 is a deficient number, since it is larger than the sum of its proper divisors (1).

253520009 is an equidigital number, since it uses as much as digits as its factorization.

253520009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 253520009 is about 15922.3116726184. The cubic root of 253520009 is about 632.9033783244.

The spelling of 253520009 in words is "two hundred fifty-three million, five hundred twenty thousand, nine".