71471918 has 16 divisors (see below), whose sum is σ = 122744160. Its totient is φ = 30575616.

The previous prime is 71471909. The next prime is 71471923. The reversal of 71471918 is 81917417.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3998 + ... + 12606.

It is an arithmetic number, because the mean of its divisors is an integer number (7671510).

Almost surely, 2^71471918 is an apocalyptic number.

71471918 is a deficient number, since it is larger than the sum of its proper divisors (51272242).

71471918 is a wasteful number, since it uses less digits than its factorization.

71471918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211.

The product of its digits is 14112, while the sum is 38.

The square root of 71471918 is about 8454.1065760966. The cubic root of 71471918 is about 414.9971800263.

The spelling of 71471918 in words is "seventy-one million, four hundred seventy-one thousand, nine hundred eighteen".