73228289 has 2 divisors, whose sum is σ = 73228290. Its totient is φ = 73228288.

The previous prime is 73228279. The next prime is 73228313. The reversal of 73228289 is 98282237.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 17098225 = 7492^2 + 4135^2 .

It is an emirp because it is prime and its reverse (98282237) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73228289 - 2²⁰ = 72179713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73228229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36614144 + 36614145.

It is an arithmetic number, because the mean of its divisors is an integer number (36614145).

Almost surely, 2^73228289 is an apocalyptic number.

It is an amenable number.

73228289 is a deficient number, since it is larger than the sum of its proper divisors (1).

73228289 is an equidigital number, since it uses as much as digits as its factorization.

73228289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 73228289 is about 8557.3529201500. The cubic root of 73228289 is about 418.3691270922.

The spelling of 73228289 in words is "seventy-three million, two hundred twenty-eight thousand, two hundred eighty-nine".