669329 has 2 divisors, whose sum is σ = 669330. Its totient is φ = 669328.

The previous prime is 669311. The next prime is 669359. The reversal of 669329 is 923966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336400 + 332929 = 580^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 669329 - 2¹² = 665233 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6 + 6 + 3⁵ + 9⁴ + 2¹⁷ + 9⁶ .

It is not a weakly prime, because it can be changed into another prime (669359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334664 + 334665.

It is an arithmetic number, because the mean of its divisors is an integer number (334665).

2⁶⁶⁹³²⁹ is an apocalyptic number.

It is an amenable number.

669329 is a deficient number, since it is larger than the sum of its proper divisors (1).

669329 is an equidigital number, since it uses as much as digits as its factorization.

669329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 669329 is about 818.1252960274. The cubic root of 669329 is about 87.4741801368.

The spelling of 669329 in words is "six hundred sixty-nine thousand, three hundred twenty-nine".