6388423 has 4 divisors (see below), whose sum is σ = 6402240. Its totient is φ = 6374608.

The previous prime is 6388409. The next prime is 6388429. The reversal of 6388423 is 3248836.

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 6388423 - 2⁵ = 6388391 is a prime.

It is a Duffinian number.

6388423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6388429) 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, 6190 + ... + 7147.

It is an arithmetic number, because the mean of its divisors is an integer number (1600560).

Almost surely, 2^6388423 is an apocalyptic number.

6388423 is a deficient number, since it is larger than the sum of its proper divisors (13817).

6388423 is a wasteful number, since it uses less digits than its factorization.

6388423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13816.

The product of its digits is 27648, while the sum is 34.

The square root of 6388423 is about 2527.5329869262. The cubic root of 6388423 is about 185.5515364540.

The spelling of 6388423 in words is "six million, three hundred eighty-eight thousand, four hundred twenty-three".