73313321 has 2 divisors, whose sum is σ = 73313322. Its totient is φ = 73313320.

The previous prime is 73313309. The next prime is 73313347. The reversal of 73313321 is 12331337.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 28944400 = 6661^2 + 5380^2 .

It is an emirp because it is prime and its reverse (12331337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73313321 - 2¹⁰ = 73312297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73313921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36656660 + 36656661.

It is an arithmetic number, because the mean of its divisors is an integer number (36656661).

Almost surely, 2^73313321 is an apocalyptic number.

It is an amenable number.

73313321 is a deficient number, since it is larger than the sum of its proper divisors (1).

73313321 is an equidigital number, since it uses as much as digits as its factorization.

73313321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 23.

The square root of 73313321 is about 8562.3198375207. The cubic root of 73313321 is about 418.5309998843.

Adding to 73313321 its reverse (12331337), we get a palindrome (85644658).

The spelling of 73313321 in words is "seventy-three million, three hundred thirteen thousand, three hundred twenty-one".