247548985961 has 2 divisors, whose sum is σ = 247548985962. Its totient is φ = 247548985960.

The previous prime is 247548985913. The next prime is 247548985967. The reversal of 247548985961 is 169589845742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200127390736 + 47421595225 = 447356^2 + 217765^2 .

It is a cyclic number.

It is not a de Polignac number, because 247548985961 - 2¹⁸ = 247548723817 is a prime.

It is a super-2 number, since 2×247548985961² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247548985891 and 247548985900.

It is not a weakly prime, because it can be changed into another prime (247548985967) 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, 123774492980 + 123774492981.

It is an arithmetic number, because the mean of its divisors is an integer number (123774492981).

Almost surely, 2^247548985961 is an apocalyptic number.

It is an amenable number.

247548985961 is a deficient number, since it is larger than the sum of its proper divisors (1).

247548985961 is an equidigital number, since it uses as much as digits as its factorization.

247548985961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174182400, while the sum is 68.

The spelling of 247548985961 in words is "two hundred forty-seven billion, five hundred forty-eight million, nine hundred eighty-five thousand, nine hundred sixty-one".