67729061 has 2 divisors, whose sum is σ = 67729062. Its totient is φ = 67729060.

The previous prime is 67729019. The next prime is 67729063. The reversal of 67729061 is 16092776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67338436 + 390625 = 8206^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 67729061 - 2²⁶ = 620197 is a prime.

It is a Sophie Germain prime.

Together with 67729063, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67729063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33864530 + 33864531.

It is an arithmetic number, because the mean of its divisors is an integer number (33864531).

Almost surely, 2^67729061 is an apocalyptic number.

It is an amenable number.

67729061 is a deficient number, since it is larger than the sum of its proper divisors (1).

67729061 is an equidigital number, since it uses as much as digits as its factorization.

67729061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 67729061 is about 8229.7667646173. The cubic root of 67729061 is about 407.6226907967.

The spelling of 67729061 in words is "sixty-seven million, seven hundred twenty-nine thousand, sixty-one".