67223909 has 2 divisors, whose sum is σ = 67223910. Its totient is φ = 67223908.

The previous prime is 67223867. The next prime is 67223929. The reversal of 67223909 is 90932276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57047809 + 10176100 = 7553^2 + 3190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67223909 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67223929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33611954 + 33611955.

It is an arithmetic number, because the mean of its divisors is an integer number (33611955).

Almost surely, 2^67223909 is an apocalyptic number.

It is an amenable number.

67223909 is a deficient number, since it is larger than the sum of its proper divisors (1).

67223909 is an equidigital number, since it uses as much as digits as its factorization.

67223909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 67223909 is about 8199.0187827569. The cubic root of 67223909 is about 406.6067533193.

The spelling of 67223909 in words is "sixty-seven million, two hundred twenty-three thousand, nine hundred nine".