669049 has 2 divisors, whose sum is σ = 669050. Its totient is φ = 669048.

The previous prime is 669029. The next prime is 669077. The reversal of 669049 is 940966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535824 + 133225 = 732^2 + 365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-669049 is a prime.

It is not a weakly prime, because it can be changed into another prime (669029) 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 as a sum of consecutive naturals, namely, 334524 + 334525.

It is an arithmetic number, because the mean of its divisors is an integer number (334525).

2⁶⁶⁹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

669049 is a deficient number, since it is larger than the sum of its proper divisors (1).

669049 is an equidigital number, since it uses as much as digits as its factorization.

669049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 669049 is about 817.9541551945. The cubic root of 669049 is about 87.4619807617.

The spelling of 669049 in words is "six hundred sixty-nine thousand, forty-nine".