809216039 has 8 divisors (see below), whose sum is σ = 831006720. Its totient is φ = 787714200.

The previous prime is 809215993. The next prime is 809216077. The reversal of 809216039 is 930612908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809216039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809215993 and 809216011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809219039) 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, 66527 + ... + 77744.

It is an arithmetic number, because the mean of its divisors is an integer number (103875840).

Almost surely, 2^809216039 is an apocalyptic number.

809216039 is a deficient number, since it is larger than the sum of its proper divisors (21790681).

809216039 is a wasteful number, since it uses less digits than its factorization.

809216039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144421.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 809216039 is about 28446.7228165214. The cubic root of 809216039 is about 931.8689202546.

The spelling of 809216039 in words is "eight hundred nine million, two hundred sixteen thousand, thirty-nine".