81716803 has 8 divisors (see below), whose sum is σ = 93459200. Its totient is φ = 69991560.

The previous prime is 81716749. The next prime is 81716827. The reversal of 81716803 is 30861718.

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 81716803 - 2²⁵ = 48162371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81716203) 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, 8458 + ... + 15328.

It is an arithmetic number, because the mean of its divisors is an integer number (11682400).

Almost surely, 2^81716803 is an apocalyptic number.

81716803 is a deficient number, since it is larger than the sum of its proper divisors (11742397).

81716803 is a wasteful number, since it uses less digits than its factorization.

81716803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8577.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 81716803 is about 9039.7346753099. The cubic root of 81716803 is about 433.9474318174.

The spelling of 81716803 in words is "eighty-one million, seven hundred sixteen thousand, eight hundred three".