6409969 has 8 divisors (see below), whose sum is σ = 6823008. Its totient is φ = 6000960.

The previous prime is 6409943. The next prime is 6410009. The reversal of 6409969 is 9699046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6409969 - 2¹⁷ = 6278897 is a prime.

It is a super-2 number, since 2×6409969² = 82175405161922, which contains 22 as substring.

It is a Duffinian number.

6409969 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6409369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2694 + ... + 4480.

It is an arithmetic number, because the mean of its divisors is an integer number (852876).

Almost surely, 2^6409969 is an apocalyptic number.

It is an amenable number.

6409969 is a deficient number, since it is larger than the sum of its proper divisors (413039).

6409969 is a wasteful number, since it uses less digits than its factorization.

6409969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 6409969 is about 2531.7916580951. The cubic root of 6409969 is about 185.7599033332.

It can be divided in two parts, 640 and 9969, that added together give a square (10609 = 103²).

The spelling of 6409969 in words is "six million, four hundred nine thousand, nine hundred sixty-nine".