71109005 has 32 divisors (see below), whose sum is σ = 96985728. Its totient is φ = 49593600.

The previous prime is 71108993. The next prime is 71109007. The reversal of 71109005 is 50090117.

It is not a de Polignac number, because 71109005 - 2⁶ = 71108941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71109007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168695 + ... + 169115.

It is an arithmetic number, because the mean of its divisors is an integer number (3030804).

Almost surely, 2^71109005 is an apocalyptic number.

It is an amenable number.

71109005 is a deficient number, since it is larger than the sum of its proper divisors (25876723).

71109005 is a wasteful number, since it uses less digits than its factorization.

71109005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 71109005 is about 8432.6155491639. The cubic root of 71109005 is about 414.2935773096.

The spelling of 71109005 in words is "seventy-one million, one hundred nine thousand, five".