245842813 has 2 divisors, whose sum is σ = 245842814. Its totient is φ = 245842812.

The previous prime is 245842811. The next prime is 245842819. The reversal of 245842813 is 318248542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212051844 + 33790969 = 14562^2 + 5813^2 .

It is a cyclic number.

It is not a de Polignac number, because 245842813 - 2¹ = 245842811 is a prime.

Together with 245842811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245842811) 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, 122921406 + 122921407.

It is an arithmetic number, because the mean of its divisors is an integer number (122921407).

Almost surely, 2^245842813 is an apocalyptic number.

It is an amenable number.

245842813 is a deficient number, since it is larger than the sum of its proper divisors (1).

245842813 is an equidigital number, since it uses as much as digits as its factorization.

245842813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 37.

The square root of 245842813 is about 15679.3754021007. The cubic root of 245842813 is about 626.4491710084.

The spelling of 245842813 in words is "two hundred forty-five million, eight hundred forty-two thousand, eight hundred thirteen".