71988471 has 6 divisors (see below), whose sum is σ = 103983360. Its totient is φ = 47992308.

The previous prime is 71988467. The next prime is 71988487. The reversal of 71988471 is 17488917.

It is not a de Polignac number, because 71988471 - 2² = 71988467 is a prime.

It is a super-3 number, since 3×71988471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71988401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3999351 + ... + 3999368.

It is an arithmetic number, because the mean of its divisors is an integer number (17330560).

Almost surely, 2^71988471 is an apocalyptic number.

71988471 is a deficient number, since it is larger than the sum of its proper divisors (31994889).

71988471 is a wasteful number, since it uses less digits than its factorization.

71988471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7998725 (or 7998722 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 71988471 is about 8484.6019942010. The cubic root of 71988471 is about 415.9945585303.

The spelling of 71988471 in words is "seventy-one million, nine hundred eighty-eight thousand, four hundred seventy-one".