1669009 has 8 divisors (see below), whose sum is σ = 1824768. Its totient is φ = 1519680.

The previous prime is 1668983. The next prime is 1669027. The reversal of 1669009 is 9009661.

1669009 is nontrivially palindromic in base 16.

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 1669009 - 2¹⁷ = 1537937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1669049) 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, 1057 + ... + 2110.

It is an arithmetic number, because the mean of its divisors is an integer number (228096).

2^1669009 is an apocalyptic number.

It is an amenable number.

1669009 is a deficient number, since it is larger than the sum of its proper divisors (155759).

1669009 is a wasteful number, since it uses less digits than its factorization.

1669009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3215.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 1669009 is about 1291.9013120204. The cubic root of 1669009 is about 118.6186270150.

The spelling of 1669009 in words is "one million, six hundred sixty-nine thousand, nine".