6389391 has 4 divisors (see below), whose sum is σ = 8519192. Its totient is φ = 4259592.

The previous prime is 6389387. The next prime is 6389393. The reversal of 6389391 is 1939836.

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

It is not a de Polignac number, because 6389391 - 2² = 6389387 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064896 + ... + 1064901.

It is an arithmetic number, because the mean of its divisors is an integer number (2129798).

Almost surely, 2^6389391 is an apocalyptic number.

6389391 is a deficient number, since it is larger than the sum of its proper divisors (2129801).

6389391 is a wasteful number, since it uses less digits than its factorization.

6389391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129800.

The product of its digits is 34992, while the sum is 39.

The square root of 6389391 is about 2527.7244707444. The cubic root of 6389391 is about 185.5609078234.

The spelling of 6389391 in words is "six million, three hundred eighty-nine thousand, three hundred ninety-one".