43420443029 has 2 divisors, whose sum is σ = 43420443030. Its totient is φ = 43420443028.

The previous prime is 43420442983. The next prime is 43420443071. The reversal of 43420443029 is 92034402434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28713302500 + 14707140529 = 169450^2 + 121273^2 .

It is a cyclic number.

It is not a de Polignac number, because 43420443029 - 2²⁸ = 43152007573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43420443029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43420443629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710221514 + 21710221515.

It is an arithmetic number, because the mean of its divisors is an integer number (21710221515).

Almost surely, 2^43420443029 is an apocalyptic number.

It is an amenable number.

43420443029 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420443029 is an equidigital number, since it uses as much as digits as its factorization.

43420443029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 35.

The spelling of 43420443029 in words is "forty-three billion, four hundred twenty million, four hundred forty-three thousand, twenty-nine".