73123217 has 2 divisors, whose sum is σ = 73123218. Its totient is φ = 73123216.

The previous prime is 73123207. The next prime is 73123223. The reversal of 73123217 is 71232137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47761921 + 25361296 = 6911^2 + 5036^2 .

It is an emirp because it is prime and its reverse (71232137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73123217 - 2¹⁴ = 73106833 is a prime.

It is not a weakly prime, because it can be changed into another prime (73123207) 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, 36561608 + 36561609.

It is an arithmetic number, because the mean of its divisors is an integer number (36561609).

Almost surely, 2^73123217 is an apocalyptic number.

It is an amenable number.

73123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

73123217 is an equidigital number, since it uses as much as digits as its factorization.

73123217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764, while the sum is 26.

The square root of 73123217 is about 8551.2114346448. The cubic root of 73123217 is about 418.1689315886.

The spelling of 73123217 in words is "seventy-three million, one hundred twenty-three thousand, two hundred seventeen".