136761109 has 2 divisors, whose sum is σ = 136761110. Its totient is φ = 136761108.

The previous prime is 136761089. The next prime is 136761161. The reversal of 136761109 is 901167631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108618084 + 28143025 = 10422^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 136761109 - 2⁵ = 136761077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136761179) 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, 68380554 + 68380555.

It is an arithmetic number, because the mean of its divisors is an integer number (68380555).

Almost surely, 2^136761109 is an apocalyptic number.

It is an amenable number.

136761109 is a deficient number, since it is larger than the sum of its proper divisors (1).

136761109 is an equidigital number, since it uses as much as digits as its factorization.

136761109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 136761109 is about 11694.4905404212. The cubic root of 136761109 is about 515.2138603421.

The spelling of 136761109 in words is "one hundred thirty-six million, seven hundred sixty-one thousand, one hundred nine".