247798049 has 2 divisors, whose sum is σ = 247798050. Its totient is φ = 247798048.

The previous prime is 247798013. The next prime is 247798073. The reversal of 247798049 is 940897742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235407649 + 12390400 = 15343^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 247798049 - 2²⁴ = 231020833 is a prime.

It is a super-2 number, since 2×247798049² = 122807746176412802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 247797988 and 247798006.

It is not a weakly prime, because it can be changed into another prime (247798009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123899024 + 123899025.

It is an arithmetic number, because the mean of its divisors is an integer number (123899025).

Almost surely, 2^247798049 is an apocalyptic number.

It is an amenable number.

247798049 is a deficient number, since it is larger than the sum of its proper divisors (1).

247798049 is an equidigital number, since it uses as much as digits as its factorization.

247798049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 247798049 is about 15741.6024914873. The cubic root of 247798049 is about 628.1055451975.

The spelling of 247798049 in words is "two hundred forty-seven million, seven hundred ninety-eight thousand, forty-nine".