129967811 has 2 divisors, whose sum is σ = 129967812. Its totient is φ = 129967810.

The previous prime is 129967777. The next prime is 129967823. The reversal of 129967811 is 118769921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129967811 is a prime.

It is a super-2 number, since 2×129967811² = 33783263792263442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129967861) 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, 64983905 + 64983906.

It is an arithmetic number, because the mean of its divisors is an integer number (64983906).

Almost surely, 2^129967811 is an apocalyptic number.

129967811 is a deficient number, since it is larger than the sum of its proper divisors (1).

129967811 is an equidigital number, since it uses as much as digits as its factorization.

129967811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 44.

The square root of 129967811 is about 11400.3425825718. The cubic root of 129967811 is about 506.5378874484.

The spelling of 129967811 in words is "one hundred twenty-nine million, nine hundred sixty-seven thousand, eight hundred eleven".