67966729 has 2 divisors, whose sum is σ = 67966730. Its totient is φ = 67966728.

The previous prime is 67966727. The next prime is 67966739. The reversal of 67966729 is 92766976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61591104 + 6375625 = 7848^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 67966729 - 2¹ = 67966727 is a prime.

Together with 67966727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (67966727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33983364 + 33983365.

It is an arithmetic number, because the mean of its divisors is an integer number (33983365).

Almost surely, 2^67966729 is an apocalyptic number.

It is an amenable number.

67966729 is a deficient number, since it is larger than the sum of its proper divisors (1).

67966729 is an equidigital number, since it uses as much as digits as its factorization.

67966729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 52.

The square root of 67966729 is about 8244.1936537177. The cubic root of 67966729 is about 408.0989303383.

The spelling of 67966729 in words is "sixty-seven million, nine hundred sixty-six thousand, seven hundred twenty-nine".