71288317 has 2 divisors, whose sum is σ = 71288318. Its totient is φ = 71288316.

The previous prime is 71288311. The next prime is 71288333. The reversal of 71288317 is 71388217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68873401 + 2414916 = 8299^2 + 1554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71288317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71288311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35644158 + 35644159.

It is an arithmetic number, because the mean of its divisors is an integer number (35644159).

Almost surely, 2^71288317 is an apocalyptic number.

It is an amenable number.

71288317 is a deficient number, since it is larger than the sum of its proper divisors (1).

71288317 is an equidigital number, since it uses as much as digits as its factorization.

71288317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 37.

The square root of 71288317 is about 8443.2409061924. The cubic root of 71288317 is about 414.6415194333.

The spelling of 71288317 in words is "seventy-one million, two hundred eighty-eight thousand, three hundred seventeen".