45409309 has 4 divisors (see below), whose sum is σ = 49537440. Its totient is φ = 41281180.

The previous prime is 45409253. The next prime is 45409339. The reversal of 45409309 is 90390454.

45409309 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.

It is a cyclic number.

It is not a de Polignac number, because 45409309 - 2¹¹ = 45407261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45409339) 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, 2064049 + ... + 2064070.

It is an arithmetic number, because the mean of its divisors is an integer number (12384360).

Almost surely, 2^45409309 is an apocalyptic number.

It is an amenable number.

45409309 is a deficient number, since it is larger than the sum of its proper divisors (4128131).

45409309 is a wasteful number, since it uses less digits than its factorization.

45409309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128130.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 45409309 is about 6738.6429642770. The cubic root of 45409309 is about 356.7644982549.

The spelling of 45409309 in words is "forty-five million, four hundred nine thousand, three hundred nine".