129036811 has 2 divisors, whose sum is σ = 129036812. Its totient is φ = 129036810.

The previous prime is 129036767. The next prime is 129036823. The reversal of 129036811 is 118630921.

It is a strong prime.

It is an emirp because it is prime and its reverse (118630921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129036811 is a prime.

It is equal to p_7326670 and since 129036811 and 7326670 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (129036311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64518405 + 64518406.

It is an arithmetic number, because the mean of its divisors is an integer number (64518406).

Almost surely, 2^129036811 is an apocalyptic number.

129036811 is a deficient number, since it is larger than the sum of its proper divisors (1).

129036811 is an equidigital number, since it uses as much as digits as its factorization.

129036811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 129036811 is about 11359.4370899266. The cubic root of 129036811 is about 505.3254915651.

The spelling of 129036811 in words is "one hundred twenty-nine million, thirty-six thousand, eight hundred eleven".