45206009 has 4 divisors (see below), whose sum is σ = 47865204. Its totient is φ = 42546816.

The previous prime is 45206003. The next prime is 45206011. The reversal of 45206009 is 90060254.

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 13249600 + 31956409 = 3640^2 + 5653^2 .

It is a cyclic number.

It is not a de Polignac number, because 45206009 - 2¹² = 45201913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45206003) 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, 1329572 + ... + 1329605.

It is an arithmetic number, because the mean of its divisors is an integer number (11966301).

Almost surely, 2^45206009 is an apocalyptic number.

It is an amenable number.

45206009 is a deficient number, since it is larger than the sum of its proper divisors (2659195).

45206009 is a wasteful number, since it uses less digits than its factorization.

45206009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659194.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 45206009 is about 6723.5414031595. The cubic root of 45206009 is about 356.2312835555.

The spelling of 45206009 in words is "forty-five million, two hundred six thousand, nine".