43799549789 has 2 divisors, whose sum is σ = 43799549790. Its totient is φ = 43799549788.

The previous prime is 43799549779. The next prime is 43799549821. The reversal of 43799549789 is 98794599734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31460116900 + 12339432889 = 177370^2 + 111083^2 .

It is a cyclic number.

It is not a de Polignac number, because 43799549789 - 2²⁴ = 43782772573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43799549779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21899774894 + 21899774895.

It is an arithmetic number, because the mean of its divisors is an integer number (21899774895).

Almost surely, 2^43799549789 is an apocalyptic number.

It is an amenable number.

43799549789 is a deficient number, since it is larger than the sum of its proper divisors (1).

43799549789 is an equidigital number, since it uses as much as digits as its factorization.

43799549789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 74.

It can be divided in two parts, 437995 and 49789, that added together give a palindrome (487784).

The spelling of 43799549789 in words is "forty-three billion, seven hundred ninety-nine million, five hundred forty-nine thousand, seven hundred eighty-nine".