71705071 has 4 divisors (see below), whose sum is σ = 71729392. Its totient is φ = 71680752.

The previous prime is 71705063. The next prime is 71705113. The reversal of 71705071 is 17050717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71705071 - 2³ = 71705063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71705021) 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 in 3 ways as a sum of consecutive naturals, for example, 7011 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (17932348).

Almost surely, 2^71705071 is an apocalyptic number.

71705071 is a deficient number, since it is larger than the sum of its proper divisors (24321).

71705071 is a wasteful number, since it uses less digits than its factorization.

71705071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24320.

The product of its (nonzero) digits is 1715, while the sum is 28.

The square root of 71705071 is about 8467.8846827292. The cubic root of 71705071 is about 415.4479529416.

Adding to 71705071 its reverse (17050717), we get a palindrome (88755788).

The spelling of 71705071 in words is "seventy-one million, seven hundred five thousand, seventy-one".