43968868609 has 2 divisors, whose sum is σ = 43968868610. Its totient is φ = 43968868608.

The previous prime is 43968868583. The next prime is 43968868613. The reversal of 43968868609 is 90686886934.

It is a happy number.

43968868609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43752925584 + 215943025 = 209172^2 + 14695^2 .

It is a cyclic number.

It is not a de Polignac number, because 43968868609 - 2¹¹ = 43968866561 is a prime.

It is a super-2 number, since 2×43968868609² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43968868649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21984434304 + 21984434305.

It is an arithmetic number, because the mean of its divisors is an integer number (21984434305).

Almost surely, 2^43968868609 is an apocalyptic number.

It is an amenable number.

43968868609 is a deficient number, since it is larger than the sum of its proper divisors (1).

43968868609 is an equidigital number, since it uses as much as digits as its factorization.

43968868609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107495424, while the sum is 67.

The spelling of 43968868609 in words is "forty-three billion, nine hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred nine".