71105943 has 4 divisors (see below), whose sum is σ = 94807928. Its totient is φ = 47403960.

The previous prime is 71105933. The next prime is 71105959. The reversal of 71105943 is 34950117.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34950117 = 3 ⋅11650039.

It is not a de Polignac number, because 71105943 - 2⁵ = 71105911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71105943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71105933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11850988 + ... + 11850993.

It is an arithmetic number, because the mean of its divisors is an integer number (23701982).

Almost surely, 2^71105943 is an apocalyptic number.

71105943 is a deficient number, since it is larger than the sum of its proper divisors (23701985).

71105943 is a wasteful number, since it uses less digits than its factorization.

71105943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23701984.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 71105943 is about 8432.4339902545. The cubic root of 71105943 is about 414.2876306406.

The spelling of 71105943 in words is "seventy-one million, one hundred five thousand, nine hundred forty-three".