136791239 has 4 divisors (see below), whose sum is σ = 147313656. Its totient is φ = 126268824.

The previous prime is 136791233. The next prime is 136791253. The reversal of 136791239 is 932197631.

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

It is a cyclic number.

It is not a de Polignac number, because 136791239 - 2¹² = 136787143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136791196 and 136791205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136791233) 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, 5261189 + ... + 5261214.

It is an arithmetic number, because the mean of its divisors is an integer number (36828414).

Almost surely, 2^136791239 is an apocalyptic number.

136791239 is a deficient number, since it is larger than the sum of its proper divisors (10522417).

136791239 is a wasteful number, since it uses less digits than its factorization.

136791239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522416.

The product of its digits is 61236, while the sum is 41.

The square root of 136791239 is about 11695.7786829266. The cubic root of 136791239 is about 515.2516933535.

The spelling of 136791239 in words is "one hundred thirty-six million, seven hundred ninety-one thousand, two hundred thirty-nine".