71881089 has 24 divisors (see below), whose sum is σ = 111896928. Its totient is φ = 40924800.

The previous prime is 71881081. The next prime is 71881093. The reversal of 71881089 is 98018817.

It is not a de Polignac number, because 71881089 - 2³ = 71881081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71881089.

It is not an unprimeable number, because it can be changed into a prime (71881081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48814 + ... + 50264.

It is an arithmetic number, because the mean of its divisors is an integer number (4662372).

Almost surely, 2^71881089 is an apocalyptic number.

It is an amenable number.

71881089 is a deficient number, since it is larger than the sum of its proper divisors (40015839).

71881089 is a wasteful number, since it uses less digits than its factorization.

71881089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 71881089 is about 8478.2715809297. The cubic root of 71881089 is about 415.7876154073.

The spelling of 71881089 in words is "seventy-one million, eight hundred eighty-one thousand, eighty-nine".