245276513 has 2 divisors, whose sum is σ = 245276514. Its totient is φ = 245276512.

The previous prime is 245276509. The next prime is 245276533. The reversal of 245276513 is 315672542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187333969 + 57942544 = 13687^2 + 7612^2 .

It is a cyclic number.

It is not a de Polignac number, because 245276513 - 2² = 245276509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (245276533) 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, 122638256 + 122638257.

It is an arithmetic number, because the mean of its divisors is an integer number (122638257).

Almost surely, 2^245276513 is an apocalyptic number.

It is an amenable number.

245276513 is a deficient number, since it is larger than the sum of its proper divisors (1).

245276513 is an equidigital number, since it uses as much as digits as its factorization.

245276513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 245276513 is about 15661.3062354326. The cubic root of 245276513 is about 625.9677917265.

The spelling of 245276513 in words is "two hundred forty-five million, two hundred seventy-six thousand, five hundred thirteen".