247046561 has 2 divisors, whose sum is σ = 247046562. Its totient is φ = 247046560.

The previous prime is 247046543. The next prime is 247046573. The reversal of 247046561 is 165640742.

247046561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225600400 + 21446161 = 15020^2 + 4631^2 .

It is a cyclic number.

It is not a de Polignac number, because 247046561 - 2¹⁰ = 247045537 is a prime.

It is a super-2 number, since 2×247046561² = 122064006603853442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247046461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123523280 + 123523281.

It is an arithmetic number, because the mean of its divisors is an integer number (123523281).

Almost surely, 2^247046561 is an apocalyptic number.

It is an amenable number.

247046561 is a deficient number, since it is larger than the sum of its proper divisors (1).

247046561 is an equidigital number, since it uses as much as digits as its factorization.

247046561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 247046561 is about 15717.7148784421. The cubic root of 247046561 is about 627.4699580862.

The spelling of 247046561 in words is "two hundred forty-seven million, forty-six thousand, five hundred sixty-one".