67405321 has 2 divisors, whose sum is σ = 67405322. Its totient is φ = 67405320.

The previous prime is 67405301. The next prime is 67405333. The reversal of 67405321 is 12350476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63425296 + 3980025 = 7964^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 67405321 - 2⁹ = 67404809 is a prime.

It is a super-2 number, since 2×67405321² = 9086954598226082, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67405321.

It is not a weakly prime, because it can be changed into another prime (67405301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33702660 + 33702661.

It is an arithmetic number, because the mean of its divisors is an integer number (33702661).

Almost surely, 2^67405321 is an apocalyptic number.

It is an amenable number.

67405321 is a deficient number, since it is larger than the sum of its proper divisors (1).

67405321 is an equidigital number, since it uses as much as digits as its factorization.

67405321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 67405321 is about 8210.0743601992. The cubic root of 67405321 is about 406.9721842678.

Adding to 67405321 its reverse (12350476), we get a palindrome (79755797).

The spelling of 67405321 in words is "sixty-seven million, four hundred five thousand, three hundred twenty-one".