669043 has 4 divisors (see below), whose sum is σ = 670680. Its totient is φ = 667408.

The previous prime is 669029. The next prime is 669049. The reversal of 669043 is 340966.

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, and also an emirpimes, since its reverse is a distinct semiprime: 340966 = 2 ⋅170483.

It is a cyclic number.

It is not a de Polignac number, because 669043 - 2⁹ = 668531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (669049) 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 3 ways as a sum of consecutive naturals, for example, 396 + ... + 1222.

It is an arithmetic number, because the mean of its divisors is an integer number (167670).

2⁶⁶⁹⁰⁴³ is an apocalyptic number.

669043 is a deficient number, since it is larger than the sum of its proper divisors (1637).

669043 is an equidigital number, since it uses as much as digits as its factorization.

669043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 669043 is about 817.9504874991. The cubic root of 669043 is about 87.4617193093.

The spelling of 669043 in words is "six hundred sixty-nine thousand, forty-three".