208710136139 has 8 divisors (see below), whose sum is σ = 210329011200. Its totient is φ = 207097359336.

The previous prime is 208710136111. The next prime is 208710136177. The reversal of 208710136139 is 931631017802.

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

It is a cyclic number.

It is not a de Polignac number, because 208710136139 - 2²⁸ = 208441700683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208710136096 and 208710136105.

It is not an unprimeable number, because it can be changed into a prime (208710136109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1455839 + ... + 1592760.

It is an arithmetic number, because the mean of its divisors is an integer number (26291126400).

Almost surely, 2^208710136139 is an apocalyptic number.

208710136139 is a deficient number, since it is larger than the sum of its proper divisors (1618875061).

208710136139 is a wasteful number, since it uses less digits than its factorization.

208710136139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3049129.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 208710136139 in words is "two hundred eight billion, seven hundred ten million, one hundred thirty-six thousand, one hundred thirty-nine".