669437 has 2 divisors, whose sum is σ = 669438. Its totient is φ = 669436.

The previous prime is 669433. The next prime is 669451. The reversal of 669437 is 734966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343396 + 326041 = 586^2 + 571^2 .

It is a cyclic number.

It is not a de Polignac number, because 669437 - 2² = 669433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 669397 and 669406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334718 + 334719.

It is an arithmetic number, because the mean of its divisors is an integer number (334719).

2⁶⁶⁹⁴³⁷ is an apocalyptic number.

It is an amenable number.

669437 is a deficient number, since it is larger than the sum of its proper divisors (1).

669437 is an equidigital number, since it uses as much as digits as its factorization.

669437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 669437 is about 818.1912979249. The cubic root of 669437 is about 87.4788847008.

The spelling of 669437 in words is "six hundred sixty-nine thousand, four hundred thirty-seven".