74406209 has 2 divisors, whose sum is σ = 74406210. Its totient is φ = 74406208.

The previous prime is 74406193. The next prime is 74406251. The reversal of 74406209 is 90260447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53246209 + 21160000 = 7297^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 74406209 - 2⁴ = 74406193 is a prime.

It is not a weakly prime, because it can be changed into another prime (74406259) 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, 37203104 + 37203105.

It is an arithmetic number, because the mean of its divisors is an integer number (37203105).

Almost surely, 2^74406209 is an apocalyptic number.

It is an amenable number.

74406209 is a deficient number, since it is larger than the sum of its proper divisors (1).

74406209 is an equidigital number, since it uses as much as digits as its factorization.

74406209 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 32.

The square root of 74406209 is about 8625.9033729807. The cubic root of 74406209 is about 420.6004431467.

The spelling of 74406209 in words is "seventy-four million, four hundred six thousand, two hundred nine".