43344123409 has 2 divisors, whose sum is σ = 43344123410. Its totient is φ = 43344123408.

The previous prime is 43344123391. The next prime is 43344123421. The reversal of 43344123409 is 90432144334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34948433025 + 8395690384 = 186945^2 + 91628^2 .

It is a cyclic number.

It is not a de Polignac number, because 43344123409 - 2²⁹ = 42807252497 is a prime.

It is a super-3 number, since 3×43344123409³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (43344123469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21672061704 + 21672061705.

It is an arithmetic number, because the mean of its divisors is an integer number (21672061705).

Almost surely, 2^43344123409 is an apocalyptic number.

It is an amenable number.

43344123409 is a deficient number, since it is larger than the sum of its proper divisors (1).

43344123409 is an equidigital number, since it uses as much as digits as its factorization.

43344123409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 37.

It can be divided in two parts, 43344 and 123409, that added together give a triangular number (166753 = T₅₇₇).

The spelling of 43344123409 in words is "forty-three billion, three hundred forty-four million, one hundred twenty-three thousand, four hundred nine".