136808139 has 8 divisors (see below), whose sum is σ = 196442512. Its totient is φ = 84189600.

The previous prime is 136808137. The next prime is 136808201. The reversal of 136808139 is 931808631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136808139 - 2¹ = 136808137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 3507901 = 136808139 / (1 + 3 + 6 + 8 + 0 + 8 + 1 + 3 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136808097 and 136808106.

It is not an unprimeable number, because it can be changed into a prime (136808131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1753912 + ... + 1753989.

It is an arithmetic number, because the mean of its divisors is an integer number (24555314).

Almost surely, 2^136808139 is an apocalyptic number.

136808139 is a deficient number, since it is larger than the sum of its proper divisors (59634373).

136808139 is a wasteful number, since it uses less digits than its factorization.

136808139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507917.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 136808139 is about 11696.5011435044. The cubic root of 136808139 is about 515.2729115618.

The spelling of 136808139 in words is "one hundred thirty-six million, eight hundred eight thousand, one hundred thirty-nine".