129694811 has 2 divisors, whose sum is σ = 129694812. Its totient is φ = 129694810.

The previous prime is 129694801. The next prime is 129694871. The reversal of 129694811 is 118496921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129694811 is a prime.

It is not a weakly prime, because it can be changed into another prime (129694801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64847405 + 64847406.

It is an arithmetic number, because the mean of its divisors is an integer number (64847406).

Almost surely, 2^129694811 is an apocalyptic number.

129694811 is a deficient number, since it is larger than the sum of its proper divisors (1).

129694811 is an equidigital number, since it uses as much as digits as its factorization.

129694811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 129694811 is about 11388.3629640085. The cubic root of 129694811 is about 506.1829744928.

The spelling of 129694811 in words is "one hundred twenty-nine million, six hundred ninety-four thousand, eight hundred eleven".