135649169 has 4 divisors (see below), whose sum is σ = 135718896. Its totient is φ = 135579444.

The previous prime is 135649139. The next prime is 135649187. The reversal of 135649169 is 961946531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135649169 - 2¹⁶ = 135583633 is a prime.

It is a super-2 number, since 2×135649169² = 36801394100781122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135649139) 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 in 3 ways as a sum of consecutive naturals, for example, 31859 + ... + 35864.

It is an arithmetic number, because the mean of its divisors is an integer number (33929724).

Almost surely, 2^135649169 is an apocalyptic number.

It is an amenable number.

135649169 is a deficient number, since it is larger than the sum of its proper divisors (69727).

135649169 is an equidigital number, since it uses as much as digits as its factorization.

135649169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69726.

The product of its digits is 174960, while the sum is 44.

The square root of 135649169 is about 11646.8523215502. The cubic root of 135649169 is about 513.8137386756.

The spelling of 135649169 in words is "one hundred thirty-five million, six hundred forty-nine thousand, one hundred sixty-nine".