136809143 has 2 divisors, whose sum is σ = 136809144. Its totient is φ = 136809142.

The previous prime is 136809133. The next prime is 136809157. The reversal of 136809143 is 341908631.

136809143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136809143 - 2²⁴ = 120031927 is a prime.

It is a Sophie Germain prime.

It is equal to p_7742078 and since 136809143 and 7742078 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136809103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68404571 + 68404572.

It is an arithmetic number, because the mean of its divisors is an integer number (68404572).

Almost surely, 2^136809143 is an apocalyptic number.

136809143 is a deficient number, since it is larger than the sum of its proper divisors (1).

136809143 is an equidigital number, since it uses as much as digits as its factorization.

136809143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 136809143 is about 11696.5440622433. The cubic root of 136809143 is about 515.2741720442.

The spelling of 136809143 in words is "one hundred thirty-six million, eight hundred nine thousand, one hundred forty-three".