135169549 has 2 divisors, whose sum is σ = 135169550. Its totient is φ = 135169548.

The previous prime is 135169513. The next prime is 135169589. The reversal of 135169549 is 945961531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97653924 + 37515625 = 9882^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 135169549 - 2⁹ = 135169037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135169589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67584774 + 67584775.

It is an arithmetic number, because the mean of its divisors is an integer number (67584775).

Almost surely, 2^135169549 is an apocalyptic number.

It is an amenable number.

135169549 is a deficient number, since it is larger than the sum of its proper divisors (1).

135169549 is an equidigital number, since it uses as much as digits as its factorization.

135169549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 43.

The square root of 135169549 is about 11626.2439764526. The cubic root of 135169549 is about 513.2074532048.

The spelling of 135169549 in words is "one hundred thirty-five million, one hundred sixty-nine thousand, five hundred forty-nine".