136840339 has 4 divisors (see below), whose sum is σ = 136888024. Its totient is φ = 136792656.

The previous prime is 136840307. The next prime is 136840343. The reversal of 136840339 is 933048631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933048631 = 10337 ⋅90263.

It is a cyclic number.

It is not a de Polignac number, because 136840339 - 2⁵ = 136840307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136840298 and 136840307.

It is not an unprimeable number, because it can be changed into a prime (136840369) 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, 19242 + ... + 25375.

It is an arithmetic number, because the mean of its divisors is an integer number (34222006).

Almost surely, 2^136840339 is an apocalyptic number.

136840339 is a deficient number, since it is larger than the sum of its proper divisors (47685).

136840339 is an equidigital number, since it uses as much as digits as its factorization.

136840339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47684.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 136840339 is about 11697.8775425288. The cubic root of 136840339 is about 515.3133343182.

The spelling of 136840339 in words is "one hundred thirty-six million, eight hundred forty thousand, three hundred thirty-nine".