71065289 has 2 divisors, whose sum is σ = 71065290. Its totient is φ = 71065288.

The previous prime is 71065231. The next prime is 71065297. The reversal of 71065289 is 98256017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70224400 + 840889 = 8380^2 + 917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71065289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71064289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35532644 + 35532645.

It is an arithmetic number, because the mean of its divisors is an integer number (35532645).

Almost surely, 2^71065289 is an apocalyptic number.

It is an amenable number.

71065289 is a deficient number, since it is larger than the sum of its proper divisors (1).

71065289 is an equidigital number, since it uses as much as digits as its factorization.

71065289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 71065289 is about 8430.0230723290. The cubic root of 71065289 is about 414.2086608692.

The spelling of 71065289 in words is "seventy-one million, sixty-five thousand, two hundred eighty-nine".