6388997 has 4 divisors (see below), whose sum is σ = 6725280. Its totient is φ = 6052716.

The previous prime is 6388981. The next prime is 6389017. The reversal of 6388997 is 7998836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6388997 - 2⁴ = 6388981 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 (6388927) 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, 168113 + ... + 168150.

It is an arithmetic number, because the mean of its divisors is an integer number (1681320).

Almost surely, 2^6388997 is an apocalyptic number.

It is an amenable number.

6388997 is a deficient number, since it is larger than the sum of its proper divisors (336283).

6388997 is a wasteful number, since it uses less digits than its factorization.

6388997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336282.

The product of its digits is 653184, while the sum is 50.

The square root of 6388997 is about 2527.6465338334. The cubic root of 6388997 is about 185.5570935579.

The spelling of 6388997 in words is "six million, three hundred eighty-eight thousand, nine hundred ninety-seven".