67729069 has 2 divisors, whose sum is σ = 67729070. Its totient is φ = 67729068.

The previous prime is 67729063. The next prime is 67729073. The reversal of 67729069 is 96092776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 407044 = 8205^2 + 638^2 .

It is a cyclic number.

It is not a de Polignac number, because 67729069 - 2³ = 67729061 is a prime.

It is a super-2 number, since 2×67729069² = 9174453575213522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67729061) 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, 33864534 + 33864535.

It is an arithmetic number, because the mean of its divisors is an integer number (33864535).

Almost surely, 2^67729069 is an apocalyptic number.

It is an amenable number.

67729069 is a deficient number, since it is larger than the sum of its proper divisors (1).

67729069 is an equidigital number, since it uses as much as digits as its factorization.

67729069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 67729069 is about 8229.7672506578. The cubic root of 67729069 is about 407.6227068458.

The spelling of 67729069 in words is "sixty-seven million, seven hundred twenty-nine thousand, sixty-nine".