67054391 has 2 divisors, whose sum is σ = 67054392. Its totient is φ = 67054390.

The previous prime is 67054387. The next prime is 67054411. The reversal of 67054391 is 19345076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67054391 - 2² = 67054387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67054301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33527195 + 33527196.

It is an arithmetic number, because the mean of its divisors is an integer number (33527196).

Almost surely, 2^67054391 is an apocalyptic number.

67054391 is a deficient number, since it is larger than the sum of its proper divisors (1).

67054391 is an equidigital number, since it uses as much as digits as its factorization.

67054391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 67054391 is about 8188.6745569720. The cubic root of 67054391 is about 406.2646866170.

The spelling of 67054391 in words is "sixty-seven million, fifty-four thousand, three hundred ninety-one".