43180728139 has 2 divisors, whose sum is σ = 43180728140. Its totient is φ = 43180728138.

The previous prime is 43180728133. The next prime is 43180728163. The reversal of 43180728139 is 93182708134.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43180728139 is a prime.

It is a super-2 number, since 2×43180728139² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43180728133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21590364069 + 21590364070.

It is an arithmetic number, because the mean of its divisors is an integer number (21590364070).

Almost surely, 2^43180728139 is an apocalyptic number.

43180728139 is a deficient number, since it is larger than the sum of its proper divisors (1).

43180728139 is an equidigital number, since it uses as much as digits as its factorization.

43180728139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

It can be divided in two parts, 4318072 and 8139, that added together give a triangular number (4326211 = T₂₉₄₁).

The spelling of 43180728139 in words is "forty-three billion, one hundred eighty million, seven hundred twenty-eight thousand, one hundred thirty-nine".