71911085 has 4 divisors (see below), whose sum is σ = 86293308. Its totient is φ = 57528864.

The previous prime is 71911079. The next prime is 71911111. The reversal of 71911085 is 58011917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21031396 + 50879689 = 4586^2 + 7133^2 .

It is a cyclic number.

It is not a de Polignac number, because 71911085 - 2⁴ = 71911069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7191104 + ... + 7191113.

It is an arithmetic number, because the mean of its divisors is an integer number (21573327).

Almost surely, 2^71911085 is an apocalyptic number.

It is an amenable number.

71911085 is a deficient number, since it is larger than the sum of its proper divisors (14382223).

71911085 is a wasteful number, since it uses less digits than its factorization.

71911085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14382222.

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 71911085 is about 8480.0403890548. The cubic root of 71911085 is about 415.8454434630.

The spelling of 71911085 in words is "seventy-one million, nine hundred eleven thousand, eighty-five".