135449969 has 2 divisors, whose sum is σ = 135449970. Its totient is φ = 135449968.

The previous prime is 135449959. The next prime is 135449987. The reversal of 135449969 is 969944531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131790400 + 3659569 = 11480^2 + 1913^2 .

It is an emirp because it is prime and its reverse (969944531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135449969 is a prime.

It is a super-2 number, since 2×135449969² = 36693388204201922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135449929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67724984 + 67724985.

It is an arithmetic number, because the mean of its divisors is an integer number (67724985).

Almost surely, 2^135449969 is an apocalyptic number.

It is an amenable number.

135449969 is a deficient number, since it is larger than the sum of its proper divisors (1).

135449969 is an equidigital number, since it uses as much as digits as its factorization.

135449969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 135449969 is about 11638.2975129527. The cubic root of 135449969 is about 513.5621046519.

The spelling of 135449969 in words is "one hundred thirty-five million, four hundred forty-nine thousand, nine hundred sixty-nine".