71326517 has 2 divisors, whose sum is σ = 71326518. Its totient is φ = 71326516.

The previous prime is 71326501. The next prime is 71326523. The reversal of 71326517 is 71562317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 11015761 = 7766^2 + 3319^2 .

It is an emirp because it is prime and its reverse (71562317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71326517 - 2⁴ = 71326501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71325517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35663258 + 35663259.

It is an arithmetic number, because the mean of its divisors is an integer number (35663259).

Almost surely, 2^71326517 is an apocalyptic number.

It is an amenable number.

71326517 is a deficient number, since it is larger than the sum of its proper divisors (1).

71326517 is an equidigital number, since it uses as much as digits as its factorization.

71326517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8820, while the sum is 32.

The square root of 71326517 is about 8445.5027677457. The cubic root of 71326517 is about 414.7155683957.

The spelling of 71326517 in words is "seventy-one million, three hundred twenty-six thousand, five hundred seventeen".