43018905049 has 2 divisors, whose sum is σ = 43018905050. Its totient is φ = 43018905048.

The previous prime is 43018905029. The next prime is 43018905089. The reversal of 43018905049 is 94050981034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39188161600 + 3830743449 = 197960^2 + 61893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43018905049 is a prime.

It is a super-2 number, since 2×43018905049² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43018904996 and 43018905014.

It is not a weakly prime, because it can be changed into another prime (43018905019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21509452524 + 21509452525.

It is an arithmetic number, because the mean of its divisors is an integer number (21509452525).

Almost surely, 2^43018905049 is an apocalyptic number.

It is an amenable number.

43018905049 is a deficient number, since it is larger than the sum of its proper divisors (1).

43018905049 is an equidigital number, since it uses as much as digits as its factorization.

43018905049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 43018905049 in words is "forty-three billion, eighteen million, nine hundred five thousand, forty-nine".