67136243 has 2 divisors, whose sum is σ = 67136244. Its totient is φ = 67136242.

The previous prime is 67136233. The next prime is 67136299. The reversal of 67136243 is 34263176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67136243 - 2⁴ = 67136227 is a prime.

It is not a weakly prime, because it can be changed into another prime (67136233) 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, 33568121 + 33568122.

It is an arithmetic number, because the mean of its divisors is an integer number (33568122).

Almost surely, 2^67136243 is an apocalyptic number.

67136243 is a deficient number, since it is larger than the sum of its proper divisors (1).

67136243 is an equidigital number, since it uses as much as digits as its factorization.

67136243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

The square root of 67136243 is about 8193.6709111362. The cubic root of 67136243 is about 406.4299258859.

The spelling of 67136243 in words is "sixty-seven million, one hundred thirty-six thousand, two hundred forty-three".