129963689 has 2 divisors, whose sum is σ = 129963690. Its totient is φ = 129963688.

The previous prime is 129963677. The next prime is 129963697. The reversal of 129963689 is 986369921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109893289 + 20070400 = 10483^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 129963689 - 2¹² = 129959593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129963689.

It is not a weakly prime, because it can be changed into another prime (129963089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64981844 + 64981845.

It is an arithmetic number, because the mean of its divisors is an integer number (64981845).

Almost surely, 2^129963689 is an apocalyptic number.

It is an amenable number.

129963689 is a deficient number, since it is larger than the sum of its proper divisors (1).

129963689 is an equidigital number, since it uses as much as digits as its factorization.

129963689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 53.

The square root of 129963689 is about 11400.1617970974. The cubic root of 129963689 is about 506.5325323500.

The spelling of 129963689 in words is "one hundred twenty-nine million, nine hundred sixty-three thousand, six hundred eighty-nine".