135543469 has 4 divisors (see below), whose sum is σ = 139206844. Its totient is φ = 131880096.

The previous prime is 135543449. The next prime is 135543491. The reversal of 135543469 is 964345531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964345531 = 6991 ⋅137941.

It can be written as a sum of positive squares in 2 ways, for example, as 108368100 + 27175369 = 10410^2 + 5213^2 .

It is a cyclic number.

It is not a de Polignac number, because 135543469 - 2¹⁵ = 135510701 is a prime.

It is a super-2 number, since 2×135543469² = 36744063977107922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135543449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1831632 + ... + 1831705.

It is an arithmetic number, because the mean of its divisors is an integer number (34801711).

Almost surely, 2^135543469 is an apocalyptic number.

It is an amenable number.

135543469 is a deficient number, since it is larger than the sum of its proper divisors (3663375).

135543469 is an equidigital number, since it uses as much as digits as its factorization.

135543469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663374.

The product of its digits is 194400, while the sum is 40.

The square root of 135543469 is about 11642.3137305262. The cubic root of 135543469 is about 513.6802467048.

The spelling of 135543469 in words is "one hundred thirty-five million, five hundred forty-three thousand, four hundred sixty-nine".