129729563 has 2 divisors, whose sum is σ = 129729564. Its totient is φ = 129729562.

The previous prime is 129729539. The next prime is 129729629. The reversal of 129729563 is 365927921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129729563 - 2¹⁶ = 129664027 is a prime.

It is not a weakly prime, because it can be changed into another prime (129729503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64864781 + 64864782.

It is an arithmetic number, because the mean of its divisors is an integer number (64864782).

Almost surely, 2^129729563 is an apocalyptic number.

129729563 is a deficient number, since it is larger than the sum of its proper divisors (1).

129729563 is an equidigital number, since it uses as much as digits as its factorization.

129729563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 129729563 is about 11389.8886298330. Note that the first 3 decimals coincide. The cubic root of 129729563 is about 506.2281813896.

The spelling of 129729563 in words is "one hundred twenty-nine million, seven hundred twenty-nine thousand, five hundred sixty-three".