136118789 has 4 divisors (see below), whose sum is σ = 136142124. Its totient is φ = 136095456.

The previous prime is 136118777. The next prime is 136118891. The reversal of 136118789 is 987811631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 987811631 = 2017 ⋅489743.

It can be written as a sum of positive squares in 2 ways, for example, as 108472225 + 27646564 = 10415^2 + 5258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136118789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136118089) 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, 5819 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (34035531).

Almost surely, 2^136118789 is an apocalyptic number.

It is an amenable number.

136118789 is a deficient number, since it is larger than the sum of its proper divisors (23335).

136118789 is a wasteful number, since it uses less digits than its factorization.

136118789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23334.

The product of its digits is 72576, while the sum is 44.

The square root of 136118789 is about 11666.9957144074. The cubic root of 136118789 is about 514.4060000352.

The spelling of 136118789 in words is "one hundred thirty-six million, one hundred eighteen thousand, seven hundred eighty-nine".