247061669 has 2 divisors, whose sum is σ = 247061670. Its totient is φ = 247061668.

The previous prime is 247061603. The next prime is 247061687. The reversal of 247061669 is 966160742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231952900 + 15108769 = 15230^2 + 3887^2 .

It is a cyclic number.

It is not a de Polignac number, because 247061669 - 2¹⁶ = 246996133 is a prime.

It is a super-2 number, since 2×247061669² = 122078936578131122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247061569) 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, 123530834 + 123530835.

It is an arithmetic number, because the mean of its divisors is an integer number (123530835).

Almost surely, 2^247061669 is an apocalyptic number.

It is an amenable number.

247061669 is a deficient number, since it is larger than the sum of its proper divisors (1).

247061669 is an equidigital number, since it uses as much as digits as its factorization.

247061669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 247061669 is about 15718.1954753082. The cubic root of 247061669 is about 627.4827486884.

The spelling of 247061669 in words is "two hundred forty-seven million, sixty-one thousand, six hundred sixty-nine".