136618169 has 2 divisors, whose sum is σ = 136618170. Its totient is φ = 136618168.

The previous prime is 136618127. The next prime is 136618193. The reversal of 136618169 is 961816631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131974144 + 4644025 = 11488^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 136618169 - 2²⁰ = 135569593 is a prime.

It is a super-2 number, since 2×136618169² = 37329048201825122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136618199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68309084 + 68309085.

It is an arithmetic number, because the mean of its divisors is an integer number (68309085).

Almost surely, 2^136618169 is an apocalyptic number.

It is an amenable number.

136618169 is a deficient number, since it is larger than the sum of its proper divisors (1).

136618169 is an equidigital number, since it uses as much as digits as its factorization.

136618169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 136618169 is about 11688.3775178594. The cubic root of 136618169 is about 515.0343006657.

The spelling of 136618169 in words is "one hundred thirty-six million, six hundred eighteen thousand, one hundred sixty-nine".