71804109 has 32 divisors (see below), whose sum is σ = 107864064. Its totient is φ = 42194880.

The previous prime is 71804099. The next prime is 71804119. The reversal of 71804109 is 90140817.

It is an interprime number because it is at equal distance from previous prime (71804099) and next prime (71804119).

It is not a de Polignac number, because 71804109 - 2⁴ = 71804093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71804119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78364 + ... + 79274.

It is an arithmetic number, because the mean of its divisors is an integer number (3370752).

Almost surely, 2^71804109 is an apocalyptic number.

It is an amenable number.

71804109 is a deficient number, since it is larger than the sum of its proper divisors (36059955).

71804109 is a wasteful number, since it uses less digits than its factorization.

71804109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 71804109 is about 8473.7305243912. The cubic root of 71804109 is about 415.6391351704.

The spelling of 71804109 in words is "seventy-one million, eight hundred four thousand, one hundred nine".