673664447 has 2 divisors, whose sum is σ = 673664448. Its totient is φ = 673664446.

The previous prime is 673664417. The next prime is 673664477. The reversal of 673664447 is 744466376.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (673664417) and next prime (673664477).

It is a cyclic number.

It is not a de Polignac number, because 673664447 - 2⁸ = 673664191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (673664417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336832223 + 336832224.

It is an arithmetic number, because the mean of its divisors is an integer number (336832224).

Almost surely, 2^673664447 is an apocalyptic number.

673664447 is a deficient number, since it is larger than the sum of its proper divisors (1).

673664447 is an equidigital number, since it uses as much as digits as its factorization.

673664447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 47.

The square root of 673664447 is about 25955.0466576348. The cubic root of 673664447 is about 876.6263941912.

The spelling of 673664447 in words is "six hundred seventy-three million, six hundred sixty-four thousand, four hundred forty-seven".