67009121 has 8 divisors (see below), whose sum is σ = 71049384. Its totient is φ = 62979840.

The previous prime is 67009099. The next prime is 67009127. The reversal of 67009121 is 12190076.

It can be written as a sum of positive squares in 4 ways, for example, as 2768896 + 64240225 = 1664^2 + 8015^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67009121 - 2⁶ = 67009057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67009127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12191 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (8881173).

Almost surely, 2^67009121 is an apocalyptic number.

It is an amenable number.

67009121 is a deficient number, since it is larger than the sum of its proper divisors (4040263).

67009121 is a wasteful number, since it uses less digits than its factorization.

67009121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 67009121 is about 8185.9099066628. The cubic root of 67009121 is about 406.1732397457.

Adding to 67009121 its reverse (12190076), we get a palindrome (79199197).

The spelling of 67009121 in words is "sixty-seven million, nine thousand, one hundred twenty-one".