1648009 has 8 divisors (see below), whose sum is σ = 1808352. Its totient is φ = 1489440.

The previous prime is 1648001. The next prime is 1648021. The reversal of 1648009 is 9008461.

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 1648009 - 2³ = 1648001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242 + ... + 2884.

It is an arithmetic number, because the mean of its divisors is an integer number (226044).

2^1648009 is an apocalyptic number.

It is an amenable number.

1648009 is a deficient number, since it is larger than the sum of its proper divisors (160343).

1648009 is a wasteful number, since it uses less digits than its factorization.

1648009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1648009 is about 1283.7480282361. The cubic root of 1648009 is about 118.1190266942.

The spelling of 1648009 in words is "one million, six hundred forty-eight thousand, nine".