71881983 has 12 divisors (see below), whose sum is σ = 104187720. Its totient is φ = 47756016.

The previous prime is 71881919. The next prime is 71881991. The reversal of 71881983 is 38918817.

It is not a de Polignac number, because 71881983 - 2⁶ = 71881919 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71881913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10993 + ... + 16266.

It is an arithmetic number, because the mean of its divisors is an integer number (8682310).

Almost surely, 2^71881983 is an apocalyptic number.

71881983 is a deficient number, since it is larger than the sum of its proper divisors (32305737).

71881983 is a wasteful number, since it uses less digits than its factorization.

71881983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27558 (or 27555 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 71881983 is about 8478.3243037761. The cubic root of 71881983 is about 415.7893391457.

The spelling of 71881983 in words is "seventy-one million, eight hundred eighty-one thousand, nine hundred eighty-three".