45445009 has 4 divisors (see below), whose sum is σ = 46302516. Its totient is φ = 44587504.

The previous prime is 45445003. The next prime is 45445013. The reversal of 45445009 is 90054454.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14085009 + 31360000 = 3753^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 45445009 - 2¹⁹ = 44920721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45445003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428674 + ... + 428779.

It is an arithmetic number, because the mean of its divisors is an integer number (11575629).

Almost surely, 2^45445009 is an apocalyptic number.

It is an amenable number.

45445009 is a deficient number, since it is larger than the sum of its proper divisors (857507).

45445009 is an equidigital number, since it uses as much as digits as its factorization.

45445009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857506.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 45445009 is about 6741.2913451356. The cubic root of 45445009 is about 356.8579677555.

The spelling of 45445009 in words is "forty-five million, four hundred forty-five thousand, nine".