6395989 has 4 divisors (see below), whose sum is σ = 6732640. Its totient is φ = 6059340.

The previous prime is 6395981. The next prime is 6396053. The reversal of 6395989 is 9895936.

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 a cyclic number.

It is not a de Polignac number, because 6395989 - 2³ = 6395981 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6395981) 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, 168297 + ... + 168334.

It is an arithmetic number, because the mean of its divisors is an integer number (1683160).

Almost surely, 2^6395989 is an apocalyptic number.

It is an amenable number.

6395989 is a deficient number, since it is larger than the sum of its proper divisors (336651).

6395989 is a wasteful number, since it uses less digits than its factorization.

6395989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336650.

The product of its digits is 524880, while the sum is 49.

The square root of 6395989 is about 2529.0292604080. The cubic root of 6395989 is about 185.6247589623.

The spelling of 6395989 in words is "six million, three hundred ninety-five thousand, nine hundred eighty-nine".