6989409 has 36 divisors (see below), whose sum is σ = 12199824. Its totient is φ = 3987144.

The previous prime is 6989387. The next prime is 6989419. The reversal of 6989409 is 9049896.

It is not a de Polignac number, because 6989409 - 2⁸ = 6989153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6989419) 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 35 ways as a sum of consecutive naturals, for example, 11614 + ... + 12200.

It is an arithmetic number, because the mean of its divisors is an integer number (338884).

Almost surely, 2^6989409 is an apocalyptic number.

It is an amenable number.

6989409 is a deficient number, since it is larger than the sum of its proper divisors (5210415).

6989409 is an equidigital number, since it uses as much as digits as its factorization.

6989409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 6989409 is about 2643.7490425530. The cubic root of 6989409 is about 191.1965940845.

The spelling of 6989409 in words is "six million, nine hundred eighty-nine thousand, four hundred nine".