71388871 has 8 divisors (see below), whose sum is σ = 75689600. Its totient is φ = 67142520.

The previous prime is 71388857. The next prime is 71388887. The reversal of 71388871 is 17888317.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71388871 - 2⁷ = 71388743 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 (71388851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10875 + ... + 16156.

It is an arithmetic number, because the mean of its divisors is an integer number (9461200).

Almost surely, 2^71388871 is an apocalyptic number.

71388871 is a deficient number, since it is larger than the sum of its proper divisors (4300729).

71388871 is a wasteful number, since it uses less digits than its factorization.

71388871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27189.

The product of its digits is 75264, while the sum is 43.

The square root of 71388871 is about 8449.1935118093. The cubic root of 71388871 is about 414.8363820093.

The spelling of 71388871 in words is "seventy-one million, three hundred eighty-eight thousand, eight hundred seventy-one".