43444422409 has 2 divisors, whose sum is σ = 43444422410. Its totient is φ = 43444422408.

The previous prime is 43444422397. The next prime is 43444422421. The reversal of 43444422409 is 90422444434.

43444422409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (43444422397) and next prime (43444422421).

It can be written as a sum of positive squares in only one way, i.e., 42205593600 + 1238828809 = 205440^2 + 35197^2 .

It is a cyclic number.

It is not a de Polignac number, because 43444422409 - 2¹⁷ = 43444291337 is a prime.

It is a super-3 number, since 3×43444422409³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (43444422209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21722211204 + 21722211205.

It is an arithmetic number, because the mean of its divisors is an integer number (21722211205).

Almost surely, 2^43444422409 is an apocalyptic number.

It is an amenable number.

43444422409 is a deficient number, since it is larger than the sum of its proper divisors (1).

43444422409 is an equidigital number, since it uses as much as digits as its factorization.

43444422409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 43444422409 in words is "forty-three billion, four hundred forty-four million, four hundred twenty-two thousand, four hundred nine".