45348209 has 4 divisors (see below), whose sum is σ = 45364980. Its totient is φ = 45331440.

The previous prime is 45348151. The next prime is 45348217. The reversal of 45348209 is 90284354.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90284354 = 2 ⋅45142177.

It can be written as a sum of positive squares in 2 ways, for example, as 26832400 + 18515809 = 5180^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 45348209 - 2¹⁶ = 45282673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45348229) 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, 3302 + ... + 10079.

It is an arithmetic number, because the mean of its divisors is an integer number (11341245).

Almost surely, 2^45348209 is an apocalyptic number.

It is an amenable number.

45348209 is a deficient number, since it is larger than the sum of its proper divisors (16771).

45348209 is a wasteful number, since it uses less digits than its factorization.

45348209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16770.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 45348209 is about 6734.1078844937. The cubic root of 45348209 is about 356.6044129077.

The spelling of 45348209 in words is "forty-five million, three hundred forty-eight thousand, two hundred nine".