667229 has 2 divisors, whose sum is σ = 667230. Its totient is φ = 667228.

The previous prime is 667211. The next prime is 667241. The reversal of 667229 is 922766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 24025 = 802^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667195 and 667204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667129) 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, 333614 + 333615.

It is an arithmetic number, because the mean of its divisors is an integer number (333615).

2⁶⁶⁷²²⁹ is an apocalyptic number.

It is an amenable number.

667229 is a deficient number, since it is larger than the sum of its proper divisors (1).

667229 is an equidigital number, since it uses as much as digits as its factorization.

667229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 667229 is about 816.8408657750. The cubic root of 667229 is about 87.3826017415.

The spelling of 667229 in words is "six hundred sixty-seven thousand, two hundred twenty-nine".