45648209 has 2 divisors, whose sum is σ = 45648210. Its totient is φ = 45648208.

The previous prime is 45648199. The next prime is 45648217. The reversal of 45648209 is 90284654.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 5895184 = 6305^2 + 2428^2 .

It is a cyclic number.

It is not a de Polignac number, because 45648209 - 2⁴ = 45648193 is a prime.

It is not a weakly prime, because it can be changed into another prime (45645209) 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, 22824104 + 22824105.

It is an arithmetic number, because the mean of its divisors is an integer number (22824105).

Almost surely, 2^45648209 is an apocalyptic number.

It is an amenable number.

45648209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45648209 is an equidigital number, since it uses as much as digits as its factorization.

45648209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 45648209 is about 6756.3458318828. The cubic root of 45648209 is about 357.3890545261.

The spelling of 45648209 in words is "forty-five million, six hundred forty-eight thousand, two hundred nine".