45038209 has 4 divisors (see below), whose sum is σ = 46996416. Its totient is φ = 43080004.

The previous prime is 45038179. The next prime is 45038233. The reversal of 45038209 is 90283054.

45038209 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: 90283054 = 2 ⋅45141527.

It is a cyclic number.

It is not a de Polignac number, because 45038209 - 2⁹ = 45037697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45038239) 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, 979069 + ... + 979114.

It is an arithmetic number, because the mean of its divisors is an integer number (11749104).

Almost surely, 2^45038209 is an apocalyptic number.

It is an amenable number.

45038209 is a deficient number, since it is larger than the sum of its proper divisors (1958207).

45038209 is a wasteful number, since it uses less digits than its factorization.

45038209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958206.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45038209 is about 6711.0512589310. The cubic root of 45038209 is about 355.7899725891.

The spelling of 45038209 in words is "forty-five million, thirty-eight thousand, two hundred nine".