8421093 has 6 divisors (see below), whose sum is σ = 12163814. Its totient is φ = 5614056.

The previous prime is 8421079. The next prime is 8421143. The reversal of 8421093 is 3901248.

8421093 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6441444 + 1979649 = 2538^2 + 1407^2 .

It is not a de Polignac number, because 8421093 - 2⁸ = 8420837 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 (8421493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 467830 + ... + 467847.

Almost surely, 2^8421093 is an apocalyptic number.

It is an amenable number.

8421093 is a deficient number, since it is larger than the sum of its proper divisors (3742721).

8421093 is a wasteful number, since it uses less digits than its factorization.

8421093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935683 (or 935680 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8421093 is about 2901.9119559353. The cubic root of 8421093 is about 203.4492787322.

The spelling of 8421093 in words is "eight million, four hundred twenty-one thousand, ninety-three".