67345643 has 2 divisors, whose sum is σ = 67345644. Its totient is φ = 67345642.

The previous prime is 67345637. The next prime is 67345667. The reversal of 67345643 is 34654376.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67345643 - 2¹⁰ = 67344619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67345597 and 67345606.

It is not a weakly prime, because it can be changed into another prime (67344643) 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, 33672821 + 33672822.

It is an arithmetic number, because the mean of its divisors is an integer number (33672822).

Almost surely, 2^67345643 is an apocalyptic number.

67345643 is a deficient number, since it is larger than the sum of its proper divisors (1).

67345643 is an equidigital number, since it uses as much as digits as its factorization.

67345643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 38.

The square root of 67345643 is about 8206.4391181559. The cubic root of 67345643 is about 406.8520431234.

The spelling of 67345643 in words is "sixty-seven million, three hundred forty-five thousand, six hundred forty-three".