129820863503 has 2 divisors, whose sum is σ = 129820863504. Its totient is φ = 129820863502.

The previous prime is 129820863463. The next prime is 129820863509. The reversal of 129820863503 is 305368028921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129820863503 - 2⁶ = 129820863439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129820863509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64910431751 + 64910431752.

It is an arithmetic number, because the mean of its divisors is an integer number (64910431752).

Almost surely, 2^129820863503 is an apocalyptic number.

129820863503 is a deficient number, since it is larger than the sum of its proper divisors (1).

129820863503 is an equidigital number, since it uses as much as digits as its factorization.

129820863503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 129820863503 in words is "one hundred twenty-nine billion, eight hundred twenty million, eight hundred sixty-three thousand, five hundred three".