45345809 has 2 divisors, whose sum is σ = 45345810. Its totient is φ = 45345808.

The previous prime is 45345803. The next prime is 45345823. The reversal of 45345809 is 90854354.

It is a happy number.

45345809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44289025 + 1056784 = 6655^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 45345809 - 2¹² = 45341713 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (45345803) 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, 22672904 + 22672905.

It is an arithmetic number, because the mean of its divisors is an integer number (22672905).

Almost surely, 2^45345809 is an apocalyptic number.

It is an amenable number.

45345809 is a deficient number, since it is larger than the sum of its proper divisors (1).

45345809 is an equidigital number, since it uses as much as digits as its factorization.

45345809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 45345809 is about 6733.9296848126. The cubic root of 45345809 is about 356.5981218420.

The spelling of 45345809 in words is "forty-five million, three hundred forty-five thousand, eight hundred nine".