71719871 has 4 divisors (see below), whose sum is σ = 74193000. Its totient is φ = 69246744.

The previous prime is 71719861. The next prime is 71719883. The reversal of 71719871 is 17891717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17891717 = 1459 ⋅12263.

It is a cyclic number.

It is not a de Polignac number, because 71719871 - 2⁶ = 71719807 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 (71719861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1236521 + ... + 1236578.

It is an arithmetic number, because the mean of its divisors is an integer number (18548250).

Almost surely, 2^71719871 is an apocalyptic number.

71719871 is a deficient number, since it is larger than the sum of its proper divisors (2473129).

71719871 is a wasteful number, since it uses less digits than its factorization.

71719871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473128.

The product of its digits is 24696, while the sum is 41.

The square root of 71719871 is about 8468.7585276710. The cubic root of 71719871 is about 415.4765339362.

The spelling of 71719871 in words is "seventy-one million, seven hundred nineteen thousand, eight hundred seventy-one".