253604209 has 2 divisors, whose sum is σ = 253604210. Its totient is φ = 253604208.

The previous prime is 253604189. The next prime is 253604237. The reversal of 253604209 is 902406352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203689984 + 49914225 = 14272^2 + 7065^2 .

It is a cyclic number.

It is not a de Polignac number, because 253604209 - 2⁵ = 253604177 is a prime.

It is not a weakly prime, because it can be changed into another prime (253604009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126802104 + 126802105.

It is an arithmetic number, because the mean of its divisors is an integer number (126802105).

Almost surely, 2^253604209 is an apocalyptic number.

It is an amenable number.

253604209 is a deficient number, since it is larger than the sum of its proper divisors (1).

253604209 is an equidigital number, since it uses as much as digits as its factorization.

253604209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 253604209 is about 15924.9555415392. The cubic root of 253604209 is about 632.9734379699.

The spelling of 253604209 in words is "two hundred fifty-three million, six hundred four thousand, two hundred nine".