67424729 has 2 divisors, whose sum is σ = 67424730. Its totient is φ = 67424728.

The previous prime is 67424717. The next prime is 67424741. The reversal of 67424729 is 92742476.

It is a balanced prime because it is at equal distance from previous prime (67424717) and next prime (67424741).

It can be written as a sum of positive squares in only one way, i.e., 46512400 + 20912329 = 6820^2 + 4573^2 .

It is a cyclic number.

It is not a de Polignac number, because 67424729 - 2²⁰ = 66376153 is a prime.

It is not a weakly prime, because it can be changed into another prime (67424779) 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, 33712364 + 33712365.

It is an arithmetic number, because the mean of its divisors is an integer number (33712365).

Almost surely, 2^67424729 is an apocalyptic number.

It is an amenable number.

67424729 is a deficient number, since it is larger than the sum of its proper divisors (1).

67424729 is an equidigital number, since it uses as much as digits as its factorization.

67424729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 67424729 is about 8211.2562376289. The cubic root of 67424729 is about 407.0112403249.

The spelling of 67424729 in words is "sixty-seven million, four hundred twenty-four thousand, seven hundred twenty-nine".