108139 has 2 divisors, whose sum is σ = 108140.
Its totient is φ = 108138.
The previous prime is 108131. The next prime is 108161. The reversal of 108139 is 931801.
108139 = T267 + T268 +
It is an a-pointer prime, because the next prime (108161) can be obtained adding 108139 to its sum of digits (22).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 108139 - 23 = 108131 is a prime.
108139 is a lucky number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 108139.
It is not a weakly prime, because it can be changed into another prime (108131) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54069 + 54070.
It is an arithmetic number, because the mean of its divisors is an integer number (54070).
2108139 is an apocalyptic number.
108139 is the 269-th centered triangular number.
108139 is a deficient number, since it is larger than the sum of its proper divisors (1).
108139 is an equidigital number, since it uses as much as digits as its factorization.
108139 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 216, while the sum is 22.
The square root of 108139 is about 328.8449482659.
The cubic root of 108139 is about 47.6424532399.
The spelling of 108139 in words is "one hundred eight thousand, one hundred thirty-nine".