8429891 has 4 divisors (see below), whose sum is σ = 8796432. Its totient is φ = 8063352.

The previous prime is 8429867. The next prime is 8429893. The reversal of 8429891 is 1989248.

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 8429891 - 2¹⁰ = 8428867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8429893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183236 + ... + 183281.

It is an arithmetic number, because the mean of its divisors is an integer number (2199108).

Almost surely, 2^8429891 is an apocalyptic number.

8429891 is a deficient number, since it is larger than the sum of its proper divisors (366541).

8429891 is a wasteful number, since it uses less digits than its factorization.

8429891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366540.

The product of its digits is 41472, while the sum is 41.

The square root of 8429891 is about 2903.4274573338. The cubic root of 8429891 is about 203.5201057916.

The spelling of 8429891 in words is "eight million, four hundred twenty-nine thousand, eight hundred ninety-one".