252695909 has 2 divisors, whose sum is σ = 252695910. Its totient is φ = 252695908.

The previous prime is 252695881. The next prime is 252695951. The reversal of 252695909 is 909596252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246395809 + 6300100 = 15697^2 + 2510^2 .

It is a cyclic number.

It is not a de Polignac number, because 252695909 - 2²⁴ = 235918693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252695959) 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, 126347954 + 126347955.

It is an arithmetic number, because the mean of its divisors is an integer number (126347955).

Almost surely, 2^252695909 is an apocalyptic number.

It is an amenable number.

252695909 is a deficient number, since it is larger than the sum of its proper divisors (1).

252695909 is an equidigital number, since it uses as much as digits as its factorization.

252695909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 252695909 is about 15896.4118278308. The cubic root of 252695909 is about 632.2168554618.

The spelling of 252695909 in words is "two hundred fifty-two million, six hundred ninety-five thousand, nine hundred nine".