247065961 has 2 divisors, whose sum is σ = 247065962. Its totient is φ = 247065960.

The previous prime is 247065953. The next prime is 247066007. The reversal of 247065961 is 169560742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124188736 + 122877225 = 11144^2 + 11085^2 .

It is a cyclic number.

It is not a de Polignac number, because 247065961 - 2³ = 247065953 is a prime.

It is a super-2 number, since 2×247065961² = 122083178169707042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247065901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123532980 + 123532981.

It is an arithmetic number, because the mean of its divisors is an integer number (123532981).

Almost surely, 2^247065961 is an apocalyptic number.

It is an amenable number.

247065961 is a deficient number, since it is larger than the sum of its proper divisors (1).

247065961 is an equidigital number, since it uses as much as digits as its factorization.

247065961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 247065961 is about 15718.3320043827. The cubic root of 247065961 is about 627.4863822487.

The spelling of 247065961 in words is "two hundred forty-seven million, sixty-five thousand, nine hundred sixty-one".