863822009 has 4 divisors (see below), whose sum is σ = 878463120. Its totient is φ = 849180900.

The previous prime is 863821999. The next prime is 863822027. The reversal of 863822009 is 900228368.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 863822009 - 2²⁰ = 862773433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (863822039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7320467 + ... + 7320584.

It is an arithmetic number, because the mean of its divisors is an integer number (219615780).

Almost surely, 2^863822009 is an apocalyptic number.

It is an amenable number.

863822009 is a deficient number, since it is larger than the sum of its proper divisors (14641111).

863822009 is a wasteful number, since it uses less digits than its factorization.

863822009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14641110.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 863822009 is about 29390.8490690555. The cubic root of 863822009 is about 952.3752231937.

The spelling of 863822009 in words is "eight hundred sixty-three million, eight hundred twenty-two thousand, nine".