71711071 has 2 divisors, whose sum is σ = 71711072. Its totient is φ = 71711070.

The previous prime is 71711063. The next prime is 71711077. The reversal of 71711071 is 17011717.

It is a strong prime.

It is an emirp because it is prime and its reverse (17011717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71711071 - 2³ = 71711063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71711077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35855535 + 35855536.

It is an arithmetic number, because the mean of its divisors is an integer number (35855536).

Almost surely, 2^71711071 is an apocalyptic number.

71711071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71711071 is an equidigital number, since it uses as much as digits as its factorization.

71711071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 343, while the sum is 25.

The square root of 71711071 is about 8468.2389550603. The cubic root of 71711071 is about 415.4595403053.

Adding to 71711071 its reverse (17011717), we get a palindrome (88722788).

The spelling of 71711071 in words is "seventy-one million, seven hundred eleven thousand, seventy-one".