8168393 has 4 divisors (see below), whose sum is σ = 8176020. Its totient is φ = 8160768.

The previous prime is 8168371. The next prime is 8168411. The reversal of 8168393 is 3938618.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4826809 + 3341584 = 2197^2 + 1828^2 .

It is a cyclic number.

It is not a de Polignac number, because 8168393 - 2¹² = 8164297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8168333) 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, 1880 + ... + 4457.

It is an arithmetic number, because the mean of its divisors is an integer number (2044005).

Almost surely, 2^8168393 is an apocalyptic number.

It is an amenable number.

8168393 is a deficient number, since it is larger than the sum of its proper divisors (7627).

8168393 is a wasteful number, since it uses less digits than its factorization.

8168393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626.

The product of its digits is 31104, while the sum is 38.

The square root of 8168393 is about 2858.0400627003. The cubic root of 8168393 is about 201.3935426428.

The spelling of 8168393 in words is "eight million, one hundred sixty-eight thousand, three hundred ninety-three".