73122209 has 2 divisors, whose sum is σ = 73122210. Its totient is φ = 73122208.

The previous prime is 73122169. The next prime is 73122223. The reversal of 73122209 is 90222137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 18731584 = 7375^2 + 4328^2 .

It is an emirp because it is prime and its reverse (90222137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73122209 - 2²⁴ = 56344993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (73122109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36561104 + 36561105.

It is an arithmetic number, because the mean of its divisors is an integer number (36561105).

Almost surely, 2^73122209 is an apocalyptic number.

It is an amenable number.

73122209 is a deficient number, since it is larger than the sum of its proper divisors (1).

73122209 is an equidigital number, since it uses as much as digits as its factorization.

73122209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 73122209 is about 8551.1524954242. The cubic root of 73122209 is about 418.1670101003.

The spelling of 73122209 in words is "seventy-three million, one hundred twenty-two thousand, two hundred nine".