135187229 has 4 divisors (see below), whose sum is σ = 135244284. Its totient is φ = 135130176.

The previous prime is 135187219. The next prime is 135187237. The reversal of 135187229 is 922781531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67980025 + 67207204 = 8245^2 + 8198^2 .

It is a cyclic number.

It is not a de Polignac number, because 135187229 - 2⁸ = 135186973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135187192 and 135187201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135187219) 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, 24812 + ... + 29765.

It is an arithmetic number, because the mean of its divisors is an integer number (33811071).

Almost surely, 2^135187229 is an apocalyptic number.

It is an amenable number.

135187229 is a deficient number, since it is larger than the sum of its proper divisors (57055).

135187229 is an equidigital number, since it uses as much as digits as its factorization.

135187229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57054.

The product of its digits is 30240, while the sum is 38.

The square root of 135187229 is about 11627.0043003346. The cubic root of 135187229 is about 513.2298278503.

The spelling of 135187229 in words is "one hundred thirty-five million, one hundred eighty-seven thousand, two hundred twenty-nine".