1669039 has 4 divisors (see below), whose sum is σ = 1671624. Its totient is φ = 1666456.

The previous prime is 1669027. The next prime is 1669049. The reversal of 1669039 is 9309661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1669039 - 2⁷ = 1668911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668995 and 1669013.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 624 + ... + 1930.

It is an arithmetic number, because the mean of its divisors is an integer number (417906).

2^1669039 is an apocalyptic number.

1669039 is a deficient number, since it is larger than the sum of its proper divisors (2585).

1669039 is a wasteful number, since it uses less digits than its factorization.

1669039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1669039 is about 1291.9129227622. The cubic root of 1669039 is about 118.6193377237.

The spelling of 1669039 in words is "one million, six hundred sixty-nine thousand, thirty-nine".