71912109 has 8 divisors (see below), whose sum is σ = 96033600. Its totient is φ = 47866016.

The previous prime is 71912077. The next prime is 71912111. The reversal of 71912109 is 90121917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71912109 - 2⁵ = 71912077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71912119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16584 + ... + 20465.

It is an arithmetic number, because the mean of its divisors is an integer number (12004200).

Almost surely, 2^71912109 is an apocalyptic number.

It is an amenable number.

71912109 is a deficient number, since it is larger than the sum of its proper divisors (24121491).

71912109 is a wasteful number, since it uses less digits than its factorization.

71912109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37699.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 71912109 is about 8480.1007659107. The cubic root of 71912109 is about 415.8474173067.

The spelling of 71912109 in words is "seventy-one million, nine hundred twelve thousand, one hundred nine".