43975348209 has 81 divisors (see below), whose sum is σ = 72850006827. Its totient is φ = 25546858272.

The previous prime is 43975348201. The next prime is 43975348217. The reversal of 43975348209 is 90284357934.

The square root of 43975348209 is 209703.

It is a perfect power (a square), and thus also a powerful number.

43975348209 is a `hidden beast` number, since 4 + 3 + 97 + 5 + 348 + 209 = 666.

It is an interprime number because it is at equal distance from previous prime (43975348201) and next prime (43975348217).

It can be written as a sum of positive squares in only one way, i.e., 6505229025 + 37470119184 = 80655^2 + 193572^2 .

It is not a de Polignac number, because 43975348209 - 2³ = 43975348201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43975348201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 155389782 + ... + 155390064.

Almost surely, 2^43975348209 is an apocalyptic number.

43975348209 is the 209703-rd square number.

43975348209 is the 104852-nd centered octagonal number.

It is an amenable number.

43975348209 is a deficient number, since it is larger than the sum of its proper divisors (28874658618).

43975348209 is a wasteful number, since it uses less digits than its factorization.

43975348209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 43975348209 in words is "forty-three billion, nine hundred seventy-five million, three hundred forty-eight thousand, two hundred nine".