6989439 has 4 divisors (see below), whose sum is σ = 9319256. Its totient is φ = 4659624.

The previous prime is 6989429. The next prime is 6989443. The reversal of 6989439 is 9349896.

It is a happy number.

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

It is not a de Polignac number, because 6989439 - 2⁸ = 6989183 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 (6989419) 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, 1164904 + ... + 1164909.

It is an arithmetic number, because the mean of its divisors is an integer number (2329814).

Almost surely, 2^6989439 is an apocalyptic number.

6989439 is a deficient number, since it is larger than the sum of its proper divisors (2329817).

6989439 is a wasteful number, since it uses less digits than its factorization.

6989439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329816.

The product of its digits is 419904, while the sum is 48.

The square root of 6989439 is about 2643.7547163078. The cubic root of 6989439 is about 191.1968676360.

The spelling of 6989439 in words is "six million, nine hundred eighty-nine thousand, four hundred thirty-nine".