129538811 has 2 divisors, whose sum is σ = 129538812. Its totient is φ = 129538810.

The previous prime is 129538781. The next prime is 129538817. The reversal of 129538811 is 118835921.

It is a strong prime.

It is an emirp because it is prime and its reverse (118835921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129538811 - 2¹⁰ = 129537787 is a prime.

It is not a weakly prime, because it can be changed into another prime (129538817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64769405 + 64769406.

It is an arithmetic number, because the mean of its divisors is an integer number (64769406).

Almost surely, 2^129538811 is an apocalyptic number.

129538811 is a deficient number, since it is larger than the sum of its proper divisors (1).

129538811 is an equidigital number, since it uses as much as digits as its factorization.

129538811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 38.

The square root of 129538811 is about 11381.5118064342. The cubic root of 129538811 is about 505.9799434316.

The spelling of 129538811 in words is "one hundred twenty-nine million, five hundred thirty-eight thousand, eight hundred eleven".