247305765853 has 2 divisors, whose sum is σ = 247305765854. Its totient is φ = 247305765852.

The previous prime is 247305765809. The next prime is 247305765901. The reversal of 247305765853 is 358567503742.

247305765853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241574216004 + 5731549849 = 491502^2 + 75707^2 .

It is a cyclic number.

It is not a de Polignac number, because 247305765853 - 2⁹ = 247305765341 is a prime.

It is a super-2 number, since 2×247305765853² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247305765794 and 247305765803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247305165853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123652882926 + 123652882927.

It is an arithmetic number, because the mean of its divisors is an integer number (123652882927).

Almost surely, 2^247305765853 is an apocalyptic number.

It is an amenable number.

247305765853 is a deficient number, since it is larger than the sum of its proper divisors (1).

247305765853 is an equidigital number, since it uses as much as digits as its factorization.

247305765853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168000, while the sum is 55.

The spelling of 247305765853 in words is "two hundred forty-seven billion, three hundred five million, seven hundred sixty-five thousand, eight hundred fifty-three".