1669389 has 8 divisors (see below), whose sum is σ = 2277792. Its totient is φ = 1086960.

The previous prime is 1669361. The next prime is 1669391. The reversal of 1669389 is 9839661.

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

It is not a de Polignac number, because 1669389 - 2⁵ = 1669357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1669389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1669309) 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 7 ways as a sum of consecutive naturals, for example, 6342 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (284724).

2^1669389 is an apocalyptic number.

It is an amenable number.

1669389 is a deficient number, since it is larger than the sum of its proper divisors (608403).

1669389 is a wasteful number, since it uses less digits than its factorization.

1669389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12987.

The product of its digits is 69984, while the sum is 42.

The square root of 1669389 is about 1292.0483737074. The cubic root of 1669389 is about 118.6276286956.

The spelling of 1669389 in words is "one million, six hundred sixty-nine thousand, three hundred eighty-nine".