71091171 has 36 divisors (see below), whose sum is σ = 108948736. Its totient is φ = 44634240.

The previous prime is 71091157. The next prime is 71091191. The reversal of 71091171 is 17119017.

It is not a de Polignac number, because 71091171 - 2⁶ = 71091107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71091101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 559710 + ... + 559836.

Almost surely, 2^71091171 is an apocalyptic number.

71091171 is a deficient number, since it is larger than the sum of its proper divisors (37857565).

71091171 is a wasteful number, since it uses less digits than its factorization.

71091171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 441, while the sum is 27.

The square root of 71091171 is about 8431.5580410740. The cubic root of 71091171 is about 414.2589397396.

The spelling of 71091171 in words is "seventy-one million, ninety-one thousand, one hundred seventy-one".