9945667 has 2 divisors, whose sum is σ = 9945668. Its totient is φ = 9945666.

The previous prime is 9945647. The next prime is 9945679. The reversal of 9945667 is 7665499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9945667 - 2⁷ = 9945539 is a prime.

It is a Chen prime.

9945667 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9945647) 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, 4972833 + 4972834.

It is an arithmetic number, because the mean of its divisors is an integer number (4972834).

Almost surely, 2^9945667 is an apocalyptic number.

9945667 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945667 is an equidigital number, since it uses as much as digits as its factorization.

9945667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 9945667 is about 3153.6751576534. The cubic root of 9945667 is about 215.0525705231.

The spelling of 9945667 in words is "nine million, nine hundred forty-five thousand, six hundred sixty-seven".