669243 has 8 divisors (see below), whose sum is σ = 914256. Its totient is φ = 435200.

The previous prime is 669241. The next prime is 669247. The reversal of 669243 is 342966.

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 669243 - 2¹ = 669241 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 669243.

It is not an unprimeable number, because it can be changed into a prime (669241) 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, 2598 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (114282).

2⁶⁶⁹²⁴³ is an apocalyptic number.

669243 is a deficient number, since it is larger than the sum of its proper divisors (245013).

669243 is a wasteful number, since it uses less digits than its factorization.

669243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485.

The product of its digits is 7776, while the sum is 30.

The square root of 669243 is about 818.0727351526. The cubic root of 669243 is about 87.4704335480.

The spelling of 669243 in words is "six hundred sixty-nine thousand, two hundred forty-three".