45489209 has 4 divisors (see below), whose sum is σ = 45583104. Its totient is φ = 45395316.

The previous prime is 45489149. The next prime is 45489233. The reversal of 45489209 is 90298454.

45489209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90298454 = 2 ⋅45149227.

It is a cyclic number.

It is not a de Polignac number, because 45489209 - 2⁸ = 45488953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45489259) 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 in 3 ways as a sum of consecutive naturals, for example, 46217 + ... + 47190.

It is an arithmetic number, because the mean of its divisors is an integer number (11395776).

Almost surely, 2^45489209 is an apocalyptic number.

It is an amenable number.

45489209 is a deficient number, since it is larger than the sum of its proper divisors (93895).

45489209 is an equidigital number, since it uses as much as digits as its factorization.

45489209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93894.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 45489209 is about 6744.5688520468. The cubic root of 45489209 is about 356.9736241031.

The spelling of 45489209 in words is "forty-five million, four hundred eighty-nine thousand, two hundred nine".