129820138543 has 2 divisors, whose sum is σ = 129820138544. Its totient is φ = 129820138542.

The previous prime is 129820138537. The next prime is 129820138579. The reversal of 129820138543 is 345831028921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129820138543 - 2⁹ = 129820138031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129820138493 and 129820138502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129820130543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64910069271 + 64910069272.

It is an arithmetic number, because the mean of its divisors is an integer number (64910069272).

Almost surely, 2^129820138543 is an apocalyptic number.

129820138543 is a deficient number, since it is larger than the sum of its proper divisors (1).

129820138543 is an equidigital number, since it uses as much as digits as its factorization.

129820138543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 129820138543 in words is "one hundred twenty-nine billion, eight hundred twenty million, one hundred thirty-eight thousand, five hundred forty-three".