136813811 has 2 divisors, whose sum is σ = 136813812. Its totient is φ = 136813810.

The previous prime is 136813801. The next prime is 136813847. The reversal of 136813811 is 118318631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136813811 is a prime.

It is not a weakly prime, because it can be changed into another prime (136813801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68406905 + 68406906.

It is an arithmetic number, because the mean of its divisors is an integer number (68406906).

Almost surely, 2^136813811 is an apocalyptic number.

136813811 is a deficient number, since it is larger than the sum of its proper divisors (1).

136813811 is an equidigital number, since it uses as much as digits as its factorization.

136813811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 136813811 is about 11696.7436066625. The cubic root of 136813811 is about 515.2800324529.

The spelling of 136813811 in words is "one hundred thirty-six million, eight hundred thirteen thousand, eight hundred eleven".