67541729 has 2 divisors, whose sum is σ = 67541730. Its totient is φ = 67541728.

The previous prime is 67541711. The next prime is 67541737. The reversal of 67541729 is 92714576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 21641104 = 6775^2 + 4652^2 .

It is a cyclic number.

It is not a de Polignac number, because 67541729 - 2¹² = 67537633 is a prime.

It is not a weakly prime, because it can be changed into another prime (67541759) 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, 33770864 + 33770865.

It is an arithmetic number, because the mean of its divisors is an integer number (33770865).

Almost surely, 2^67541729 is an apocalyptic number.

It is an amenable number.

67541729 is a deficient number, since it is larger than the sum of its proper divisors (1).

67541729 is an equidigital number, since it uses as much as digits as its factorization.

67541729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 67541729 is about 8218.3775162741. The cubic root of 67541729 is about 407.2465288591.

The spelling of 67541729 in words is "sixty-seven million, five hundred forty-one thousand, seven hundred twenty-nine".