863900421 has 8 divisors (see below), whose sum is σ = 1152033120. Its totient is φ = 575850672.

The previous prime is 863900413. The next prime is 863900423. The reversal of 863900421 is 124009368.

863900421 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 not a de Polignac number, because 863900421 - 2³ = 863900413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863900423) 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, 10131 + ... + 42783.

It is an arithmetic number, because the mean of its divisors is an integer number (144004140).

Almost surely, 2^863900421 is an apocalyptic number.

It is an amenable number.

863900421 is a deficient number, since it is larger than the sum of its proper divisors (288132699).

863900421 is a wasteful number, since it uses less digits than its factorization.

863900421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41475.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 863900421 is about 29392.1829914010. The cubic root of 863900421 is about 952.4040390785.

Adding to 863900421 its reverse (124009368), we get a palindrome (987909789).

The spelling of 863900421 in words is "eight hundred sixty-three million, nine hundred thousand, four hundred twenty-one".