863409221 has 8 divisors (see below), whose sum is σ = 866880000. Its totient is φ = 859946400.

The previous prime is 863409187. The next prime is 863409269. The reversal of 863409221 is 122904368.

863409221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-863409221 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 (863409271) 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, 298460 + ... + 301338.

It is an arithmetic number, because the mean of its divisors is an integer number (108360000).

Almost surely, 2^863409221 is an apocalyptic number.

It is an amenable number.

863409221 is a deficient number, since it is larger than the sum of its proper divisors (3470779).

863409221 is a wasteful number, since it uses less digits than its factorization.

863409221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 863409221 is about 29383.8258400774. The cubic root of 863409221 is about 952.2234976080.

The spelling of 863409221 in words is "eight hundred sixty-three million, four hundred nine thousand, two hundred twenty-one".