135952189 has 4 divisors (see below), whose sum is σ = 135975580. Its totient is φ = 135928800.

The previous prime is 135952183. The next prime is 135952199. The reversal of 135952189 is 981259531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 54140164 + 81812025 = 7358^2 + 9045^2 .

It is a cyclic number.

It is not a de Polignac number, because 135952189 - 2³ = 135952181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135952181) 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, 4489 + ... + 17089.

It is an arithmetic number, because the mean of its divisors is an integer number (33993895).

Almost surely, 2^135952189 is an apocalyptic number.

It is an amenable number.

135952189 is a deficient number, since it is larger than the sum of its proper divisors (23391).

135952189 is a wasteful number, since it uses less digits than its factorization.

135952189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23390.

The product of its digits is 97200, while the sum is 43.

The square root of 135952189 is about 11659.8537297858. The cubic root of 135952189 is about 514.1960485468.

The spelling of 135952189 in words is "one hundred thirty-five million, nine hundred fifty-two thousand, one hundred eighty-nine".