6523989 has 4 divisors (see below), whose sum is σ = 8698656. Its totient is φ = 4349324.

The previous prime is 6523969. The next prime is 6524009. The reversal of 6523989 is 9893256.

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 an interprime number because it is at equal distance from previous prime (6523969) and next prime (6524009).

It is a cyclic number.

It is not a de Polignac number, because 6523989 - 2⁷ = 6523861 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 6523989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6523939) 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, 1087329 + ... + 1087334.

It is an arithmetic number, because the mean of its divisors is an integer number (2174664).

Almost surely, 2^6523989 is an apocalyptic number.

It is an amenable number.

6523989 is a deficient number, since it is larger than the sum of its proper divisors (2174667).

6523989 is a wasteful number, since it uses less digits than its factorization.

6523989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174666.

The product of its digits is 116640, while the sum is 42.

The square root of 6523989 is about 2554.2100540089. The cubic root of 6523989 is about 186.8548636969.

The spelling of 6523989 in words is "six million, five hundred twenty-three thousand, nine hundred eighty-nine".