9421891 has 8 divisors (see below), whose sum is σ = 10055120. Its totient is φ = 8802432.

The previous prime is 9421883. The next prime is 9421903. The reversal of 9421891 is 1981249.

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

It is a cyclic number.

It is not a de Polignac number, because 9421891 - 2³ = 9421883 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 (9421801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2010 + ... + 4783.

It is an arithmetic number, because the mean of its divisors is an integer number (1256890).

Almost surely, 2^9421891 is an apocalyptic number.

9421891 is a deficient number, since it is larger than the sum of its proper divisors (633229).

9421891 is a wasteful number, since it uses less digits than its factorization.

9421891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6885.

The product of its digits is 5184, while the sum is 34.

The square root of 9421891 is about 3069.5098957325. The cubic root of 9421891 is about 211.2091320637.

The spelling of 9421891 in words is "nine million, four hundred twenty-one thousand, eight hundred ninety-one".