6386993 has 4 divisors (see below), whose sum is σ = 6397428. Its totient is φ = 6376560.

The previous prime is 6386981. The next prime is 6387001. The reversal of 6386993 is 3996836.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2093809 + 4293184 = 1447^2 + 2072^2 .

It is a cyclic number.

It is not a de Polignac number, because 6386993 - 2¹⁶ = 6321457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6386923) 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 3 ways as a sum of consecutive naturals, for example, 4238 + ... + 5543.

It is an arithmetic number, because the mean of its divisors is an integer number (1599357).

It is a Poulet number, since it divides 2^6386992-1.

Almost surely, 2^6386993 is an apocalyptic number.

It is an amenable number.

6386993 is a deficient number, since it is larger than the sum of its proper divisors (10435).

6386993 is an equidigital number, since it uses as much as digits as its factorization.

6386993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10434.

The product of its digits is 209952, while the sum is 44.

The square root of 6386993 is about 2527.2500865565. The cubic root of 6386993 is about 185.5376906531.

The spelling of 6386993 in words is "six million, three hundred eighty-six thousand, nine hundred ninety-three".