136831811 has 2 divisors, whose sum is σ = 136831812. Its totient is φ = 136831810.

The previous prime is 136831777. The next prime is 136831829. The reversal of 136831811 is 118138631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136831811 is a prime.

It is not a weakly prime, because it can be changed into another prime (136831111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68415905 + 68415906.

It is an arithmetic number, because the mean of its divisors is an integer number (68415906).

Almost surely, 2^136831811 is an apocalyptic number.

136831811 is a deficient number, since it is larger than the sum of its proper divisors (1).

136831811 is an equidigital number, since it uses as much as digits as its factorization.

136831811 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 136831811 is about 11697.5130262804. The cubic root of 136831811 is about 515.3026291820.

The spelling of 136831811 in words is "one hundred thirty-six million, eight hundred thirty-one thousand, eight hundred eleven".