71007569 has 2 divisors, whose sum is σ = 71007570. Its totient is φ = 71007568.

The previous prime is 71007539. The next prime is 71007581. The reversal of 71007569 is 96570017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69089344 + 1918225 = 8312^2 + 1385^2 .

It is an emirp because it is prime and its reverse (96570017) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71007569 is a prime.

It is a super-2 number, since 2×71007569² = 10084149710579522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71007539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35503784 + 35503785.

It is an arithmetic number, because the mean of its divisors is an integer number (35503785).

Almost surely, 2^71007569 is an apocalyptic number.

It is an amenable number.

71007569 is a deficient number, since it is larger than the sum of its proper divisors (1).

71007569 is an equidigital number, since it uses as much as digits as its factorization.

71007569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 35.

The square root of 71007569 is about 8426.5988987254. The cubic root of 71007569 is about 414.0964889028.

The spelling of 71007569 in words is "seventy-one million, seven thousand, five hundred sixty-nine".