135697169 has 2 divisors, whose sum is σ = 135697170. Its totient is φ = 135697168.

The previous prime is 135697157. The next prime is 135697187. The reversal of 135697169 is 961796531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119793025 + 15904144 = 10945^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 135697169 - 2⁴ = 135697153 is a prime.

It is a super-2 number, since 2×135697169² = 36827443349229122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (135697139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67848584 + 67848585.

It is an arithmetic number, because the mean of its divisors is an integer number (67848585).

Almost surely, 2^135697169 is an apocalyptic number.

It is an amenable number.

135697169 is a deficient number, since it is larger than the sum of its proper divisors (1).

135697169 is an equidigital number, since it uses as much as digits as its factorization.

135697169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 135697169 is about 11648.9127818866. The cubic root of 135697169 is about 513.8743365428.

The spelling of 135697169 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, one hundred sixty-nine".