67420091 has 2 divisors, whose sum is σ = 67420092. Its totient is φ = 67420090.

The previous prime is 67420063. The next prime is 67420103. The reversal of 67420091 is 19002476.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67420091 - 2⁶ = 67420027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67420021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33710045 + 33710046.

It is an arithmetic number, because the mean of its divisors is an integer number (33710046).

Almost surely, 2^67420091 is an apocalyptic number.

67420091 is a deficient number, since it is larger than the sum of its proper divisors (1).

67420091 is an equidigital number, since it uses as much as digits as its factorization.

67420091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 67420091 is about 8210.9738155715. The cubic root of 67420091 is about 407.0019076392.

The spelling of 67420091 in words is "sixty-seven million, four hundred twenty thousand, ninety-one".