45193409 has 4 divisors (see below), whose sum is σ = 45206916. Its totient is φ = 45179904.

The previous prime is 45193363. The next prime is 45193441. The reversal of 45193409 is 90439154.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15523600 + 29669809 = 3940^2 + 5447^2 .

It is a cyclic number.

It is not a de Polignac number, because 45193409 - 2²⁰ = 44144833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45196409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2417 + ... + 9809.

It is an arithmetic number, because the mean of its divisors is an integer number (11301729).

Almost surely, 2^45193409 is an apocalyptic number.

It is an amenable number.

45193409 is a deficient number, since it is larger than the sum of its proper divisors (13507).

45193409 is an equidigital number, since it uses as much as digits as its factorization.

45193409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13506.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 45193409 is about 6722.6043316560. The cubic root of 45193409 is about 356.1981837431.

The spelling of 45193409 in words is "forty-five million, one hundred ninety-three thousand, four hundred nine".