8371993 has 6 divisors (see below), whose sum is σ = 9738906. Its totient is φ = 7175952.

The previous prime is 8371927. The next prime is 8371999. The reversal of 8371993 is 3991738.

8371993 is digitally balanced in base 3, because in such base 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., 8277129 + 94864 = 2877^2 + 308^2 .

It is not a de Polignac number, because 8371993 - 2⁹ = 8371481 is a prime.

It is a Duffinian number.

8371993 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8371999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85380 + ... + 85477.

It is an arithmetic number, because the mean of its divisors is an integer number (1623151).

Almost surely, 2^8371993 is an apocalyptic number.

It is an amenable number.

8371993 is a deficient number, since it is larger than the sum of its proper divisors (1366913).

8371993 is a wasteful number, since it uses less digits than its factorization.

8371993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170871 (or 170864 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 8371993 is about 2893.4396485844. The cubic root of 8371993 is about 203.0530974857.

The spelling of 8371993 in words is "eight million, three hundred seventy-one thousand, nine hundred ninety-three".