71716919 has 16 divisors (see below), whose sum is σ = 76170240. Its totient is φ = 67428480.

The previous prime is 71716873. The next prime is 71716927. The reversal of 71716919 is 91961717.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71716919 is a prime.

It is a super-2 number, since 2×71716919² = 10286632941705122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71716979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206504 + ... + 206850.

It is an arithmetic number, because the mean of its divisors is an integer number (4760640).

Almost surely, 2^71716919 is an apocalyptic number.

71716919 is a deficient number, since it is larger than the sum of its proper divisors (4453321).

71716919 is a wasteful number, since it uses less digits than its factorization.

71716919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550.

The product of its digits is 23814, while the sum is 41.

The square root of 71716919 is about 8468.5842382301. The cubic root of 71716919 is about 415.4708335004.

The spelling of 71716919 in words is "seventy-one million, seven hundred sixteen thousand, nine hundred nineteen".