247478891069 has 2 divisors, whose sum is σ = 247478891070. Its totient is φ = 247478891068.

The previous prime is 247478891063. The next prime is 247478891081. The reversal of 247478891069 is 960198874742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203698768900 + 43780122169 = 451330^2 + 209237^2 .

It is a cyclic number.

It is not a de Polignac number, because 247478891069 - 2¹² = 247478886973 is a prime.

It is a super-2 number, since 2×247478891069² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247478890996 and 247478891014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247478891063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123739445534 + 123739445535.

It is an arithmetic number, because the mean of its divisors is an integer number (123739445535).

Almost surely, 2^247478891069 is an apocalyptic number.

It is an amenable number.

247478891069 is a deficient number, since it is larger than the sum of its proper divisors (1).

247478891069 is an equidigital number, since it uses as much as digits as its factorization.

247478891069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 247478891069 in words is "two hundred forty-seven billion, four hundred seventy-eight million, eight hundred ninety-one thousand, sixty-nine".