129780163 has 2 divisors, whose sum is σ = 129780164. Its totient is φ = 129780162.

The previous prime is 129780151. The next prime is 129780169. The reversal of 129780163 is 361087921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129780163 is a prime.

It is not a weakly prime, because it can be changed into another prime (129780169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64890081 + 64890082.

It is an arithmetic number, because the mean of its divisors is an integer number (64890082).

Almost surely, 2^129780163 is an apocalyptic number.

129780163 is a deficient number, since it is larger than the sum of its proper divisors (1).

129780163 is an equidigital number, since it uses as much as digits as its factorization.

129780163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 129780163 is about 11392.1096817051. The cubic root of 129780163 is about 506.2939896135.

The spelling of 129780163 in words is "one hundred twenty-nine million, seven hundred eighty thousand, one hundred sixty-three".