136436869 has 2 divisors, whose sum is σ = 136436870. Its totient is φ = 136436868.

The previous prime is 136436863. The next prime is 136436879. The reversal of 136436869 is 968634631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126292644 + 10144225 = 11238^2 + 3185^2 .

It is a cyclic number.

It is not a de Polignac number, because 136436869 - 2⁹ = 136436357 is a prime.

It is a super-2 number, since 2×136436869² = 37230038445046322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136436863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68218434 + 68218435.

It is an arithmetic number, because the mean of its divisors is an integer number (68218435).

Almost surely, 2^136436869 is an apocalyptic number.

It is an amenable number.

136436869 is a deficient number, since it is larger than the sum of its proper divisors (1).

136436869 is an equidigital number, since it uses as much as digits as its factorization.

136436869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 46.

The square root of 136436869 is about 11680.6193757009. The cubic root of 136436869 is about 514.8063733097.

The spelling of 136436869 in words is "one hundred thirty-six million, four hundred thirty-six thousand, eight hundred sixty-nine".