136142389 has 4 divisors (see below), whose sum is σ = 136507756. Its totient is φ = 135777024.

The previous prime is 136142381. The next prime is 136142399. The reversal of 136142389 is 983241631.

136142389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983241631 = 17 ⋅57837743.

It can be written as a sum of positive squares in 2 ways, for example, as 46991025 + 89151364 = 6855^2 + 9442^2 .

It is a cyclic number.

It is not a de Polignac number, because 136142389 - 2³ = 136142381 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 (136142381) 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, 182124 + ... + 182869.

It is an arithmetic number, because the mean of its divisors is an integer number (34126939).

Almost surely, 2^136142389 is an apocalyptic number.

It is an amenable number.

136142389 is a deficient number, since it is larger than the sum of its proper divisors (365367).

136142389 is an equidigital number, since it uses as much as digits as its factorization.

136142389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365366.

The product of its digits is 31104, while the sum is 37.

The square root of 136142389 is about 11668.0070706184. The cubic root of 136142389 is about 514.4357272075.

The spelling of 136142389 in words is "one hundred thirty-six million, one hundred forty-two thousand, three hundred eighty-nine".