71996317 has 2 divisors, whose sum is σ = 71996318. Its totient is φ = 71996316.

The previous prime is 71996297. The next prime is 71996321. The reversal of 71996317 is 71369917.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62821476 + 9174841 = 7926^2 + 3029^2 .

It is an emirp because it is prime and its reverse (71369917) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71996317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71996387) 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, 35998158 + 35998159.

It is an arithmetic number, because the mean of its divisors is an integer number (35998159).

Almost surely, 2^71996317 is an apocalyptic number.

It is an amenable number.

71996317 is a deficient number, since it is larger than the sum of its proper divisors (1).

71996317 is an equidigital number, since it uses as much as digits as its factorization.

71996317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 71996317 is about 8485.0643486069. The cubic root of 71996317 is about 416.0096710184.

The spelling of 71996317 in words is "seventy-one million, nine hundred ninety-six thousand, three hundred seventeen".