71044109 has 4 divisors (see below), whose sum is σ = 71198016. Its totient is φ = 70890204.

The previous prime is 71044093. The next prime is 71044123. The reversal of 71044109 is 90144017.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71044109 - 2⁴ = 71044093 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 (71044409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76259 + ... + 77184.

It is an arithmetic number, because the mean of its divisors is an integer number (17799504).

Almost surely, 2^71044109 is an apocalyptic number.

It is an amenable number.

71044109 is a deficient number, since it is larger than the sum of its proper divisors (153907).

71044109 is a wasteful number, since it uses less digits than its factorization.

71044109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153906.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 71044109 is about 8428.7667543953. The cubic root of 71044109 is about 414.1675071112.

The spelling of 71044109 in words is "seventy-one million, forty-four thousand, one hundred nine".