245253109 has 2 divisors, whose sum is σ = 245253110. Its totient is φ = 245253108.

The previous prime is 245253089. The next prime is 245253137. The reversal of 245253109 is 901352542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187827025 + 57426084 = 13705^2 + 7578^2 .

It is a cyclic number.

It is not a de Polignac number, because 245253109 - 2⁷ = 245252981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245253139) 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, 122626554 + 122626555.

It is an arithmetic number, because the mean of its divisors is an integer number (122626555).

Almost surely, 2^245253109 is an apocalyptic number.

It is an amenable number.

245253109 is a deficient number, since it is larger than the sum of its proper divisors (1).

245253109 is an equidigital number, since it uses as much as digits as its factorization.

245253109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 245253109 is about 15660.5590257819. The cubic root of 245253109 is about 625.9478813867.

The spelling of 245253109 in words is "two hundred forty-five million, two hundred fifty-three thousand, one hundred nine".