9421639 has 4 divisors (see below), whose sum is σ = 9478224. Its totient is φ = 9365056.

The previous prime is 9421637. The next prime is 9421661. The reversal of 9421639 is 9361249.

9421639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9421639 - 2¹ = 9421637 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9421631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28042 + ... + 28375.

It is an arithmetic number, because the mean of its divisors is an integer number (2369556).

Almost surely, 2^9421639 is an apocalyptic number.

9421639 is a deficient number, since it is larger than the sum of its proper divisors (56585).

9421639 is a wasteful number, since it uses less digits than its factorization.

9421639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56584.

The product of its digits is 11664, while the sum is 34.

The square root of 9421639 is about 3069.4688465596. The cubic root of 9421639 is about 211.2072490314.

The spelling of 9421639 in words is "nine million, four hundred twenty-one thousand, six hundred thirty-nine".