6439489 has 4 divisors (see below), whose sum is σ = 7359424. Its totient is φ = 5519556.

The previous prime is 6439483. The next prime is 6439493. The reversal of 6439489 is 9849346.

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 6439489 - 2¹³ = 6431297 is a prime.

It is a super-2 number, since 2×6439489² = 82934037162242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6439483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459957 + ... + 459970.

It is an arithmetic number, because the mean of its divisors is an integer number (1839856).

Almost surely, 2^6439489 is an apocalyptic number.

It is an amenable number.

6439489 is a deficient number, since it is larger than the sum of its proper divisors (919935).

6439489 is an equidigital number, since it uses as much as digits as its factorization.

6439489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919934.

The product of its digits is 186624, while the sum is 43.

The square root of 6439489 is about 2537.6148249882. The cubic root of 6439489 is about 186.0446283631.

The spelling of 6439489 in words is "six million, four hundred thirty-nine thousand, four hundred eighty-nine".