73424209 has 2 divisors, whose sum is σ = 73424210. Its totient is φ = 73424208.

The previous prime is 73424179. The next prime is 73424249. The reversal of 73424209 is 90242437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73153809 + 270400 = 8553^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 73424209 - 2¹¹ = 73422161 is a prime.

It is a super-2 number, since 2×73424209² = 10782228934551362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73424249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36712104 + 36712105.

It is an arithmetic number, because the mean of its divisors is an integer number (36712105).

Almost surely, 2^73424209 is an apocalyptic number.

It is an amenable number.

73424209 is a deficient number, since it is larger than the sum of its proper divisors (1).

73424209 is an equidigital number, since it uses as much as digits as its factorization.

73424209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 73424209 is about 8568.7927387701. The cubic root of 73424209 is about 418.7419060142.

The spelling of 73424209 in words is "seventy-three million, four hundred twenty-four thousand, two hundred nine".