245064509 has 2 divisors, whose sum is σ = 245064510. Its totient is φ = 245064508.

The previous prime is 245064419. The next prime is 245064539. The reversal of 245064509 is 905460542.

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., 225660484 + 19404025 = 15022^2 + 4405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245064509 is a prime.

It is a super-2 number, since 2×245064509² = 120113227142822162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245064539) 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, 122532254 + 122532255.

It is an arithmetic number, because the mean of its divisors is an integer number (122532255).

Almost surely, 2^245064509 is an apocalyptic number.

It is an amenable number.

245064509 is a deficient number, since it is larger than the sum of its proper divisors (1).

245064509 is an equidigital number, since it uses as much as digits as its factorization.

245064509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 245064509 is about 15654.5363712887. The cubic root of 245064509 is about 625.7873886274.

The spelling of 245064509 in words is "two hundred forty-five million, sixty-four thousand, five hundred nine".