71144617 has 2 divisors, whose sum is σ = 71144618. Its totient is φ = 71144616.

The previous prime is 71144581. The next prime is 71144629. The reversal of 71144617 is 71644117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68906601 + 2238016 = 8301^2 + 1496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71144617 is a prime.

It is not a weakly prime, because it can be changed into another prime (71144657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35572308 + 35572309.

It is an arithmetic number, because the mean of its divisors is an integer number (35572309).

Almost surely, 2^71144617 is an apocalyptic number.

It is an amenable number.

71144617 is a deficient number, since it is larger than the sum of its proper divisors (1).

71144617 is an equidigital number, since it uses as much as digits as its factorization.

71144617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 71144617 is about 8434.7268479779. The cubic root of 71144617 is about 414.3627263604.

Subtracting 71144617 from its reverse (71644117), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 71144617 in words is "seventy-one million, one hundred forty-four thousand, six hundred seventeen".