67820243 has 2 divisors, whose sum is σ = 67820244. Its totient is φ = 67820242.

The previous prime is 67820237. The next prime is 67820251. The reversal of 67820243 is 34202876.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67820243 - 2²⁰ = 66771667 is a prime.

It is not a weakly prime, because it can be changed into another prime (67820143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33910121 + 33910122.

It is an arithmetic number, because the mean of its divisors is an integer number (33910122).

Almost surely, 2^67820243 is an apocalyptic number.

67820243 is a deficient number, since it is larger than the sum of its proper divisors (1).

67820243 is an equidigital number, since it uses as much as digits as its factorization.

67820243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 67820243 is about 8235.3046695311. The cubic root of 67820243 is about 407.8055329657.

The spelling of 67820243 in words is "sixty-seven million, eight hundred twenty thousand, two hundred forty-three".