67054909 has 2 divisors, whose sum is σ = 67054910. Its totient is φ = 67054908.

The previous prime is 67054907. The next prime is 67054979. The reversal of 67054909 is 90945076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59629284 + 7425625 = 7722^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 67054909 - 2¹ = 67054907 is a prime.

Together with 67054907, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67054903) 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, 33527454 + 33527455.

It is an arithmetic number, because the mean of its divisors is an integer number (33527455).

Almost surely, 2^67054909 is an apocalyptic number.

It is an amenable number.

67054909 is a deficient number, since it is larger than the sum of its proper divisors (1).

67054909 is an equidigital number, since it uses as much as digits as its factorization.

67054909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 67054909 is about 8188.7061859612. The cubic root of 67054909 is about 406.2657327556.

The spelling of 67054909 in words is "sixty-seven million, fifty-four thousand, nine hundred nine".