816379871 has 8 divisors (see below), whose sum is σ = 852266880. Its totient is φ = 780525592.

The previous prime is 816379867. The next prime is 816379891. The reversal of 816379871 is 178973618.

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 816379871 - 2² = 816379867 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 (816379891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52436 + ... + 66198.

It is an arithmetic number, because the mean of its divisors is an integer number (106533360).

Almost surely, 2^816379871 is an apocalyptic number.

816379871 is a deficient number, since it is larger than the sum of its proper divisors (35887009).

816379871 is a wasteful number, since it uses less digits than its factorization.

816379871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16365.

The product of its digits is 508032, while the sum is 50.

The square root of 816379871 is about 28572.3620129663. The cubic root of 816379871 is about 934.6107298899.

The spelling of 816379871 in words is "eight hundred sixteen million, three hundred seventy-nine thousand, eight hundred seventy-one".