43243312169 has 2 divisors, whose sum is σ = 43243312170. Its totient is φ = 43243312168.

The previous prime is 43243312153. The next prime is 43243312223. The reversal of 43243312169 is 96121334234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38420704144 + 4822608025 = 196012^2 + 69445^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243312169 - 2⁴ = 43243312153 is a prime.

It is a super-2 number, since 2×43243312169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43243312129) 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 as a sum of consecutive naturals, namely, 21621656084 + 21621656085.

It is an arithmetic number, because the mean of its divisors is an integer number (21621656085).

Almost surely, 2^43243312169 is an apocalyptic number.

It is an amenable number.

43243312169 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243312169 is an equidigital number, since it uses as much as digits as its factorization.

43243312169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The spelling of 43243312169 in words is "forty-three billion, two hundred forty-three million, three hundred twelve thousand, one hundred sixty-nine".