67728523 has 2 divisors, whose sum is σ = 67728524. Its totient is φ = 67728522.

The previous prime is 67728511. The next prime is 67728589. The reversal of 67728523 is 32582776.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67728523 is a prime.

It is not a weakly prime, because it can be changed into another prime (67728503) 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, 33864261 + 33864262.

It is an arithmetic number, because the mean of its divisors is an integer number (33864262).

Almost surely, 2^67728523 is an apocalyptic number.

67728523 is a deficient number, since it is larger than the sum of its proper divisors (1).

67728523 is an equidigital number, since it uses as much as digits as its factorization.

67728523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 67728523 is about 8229.7340783284. The cubic root of 67728523 is about 407.6216114885.

The spelling of 67728523 in words is "sixty-seven million, seven hundred twenty-eight thousand, five hundred twenty-three".