109139 has 2 divisors, whose sum is σ = 109140. Its totient is φ = 109138.
The previous prime is 109133. The next prime is 109141. The reversal of 109139 is 931901.
It is a strong prime.
It is an emirp because it is prime and its reverse (931901) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 109139 - 28 = 108883 is a prime.
It is a super-2 number, since 2×1091392 = 23822642642, which contains 22 as substring.
It is a Sophie Germain prime.
Together with 109141, it forms a pair of twin primes.
It is a Chen prime.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 109139.
It is not a weakly prime, because it can be changed into another prime (109133) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54569 + 54570.
It is an arithmetic number, because the mean of its divisors is an integer number (54570).
2109139 is an apocalyptic number.
109139 is a deficient number, since it is larger than the sum of its proper divisors (1).
109139 is an equidigital number, since it uses as much as digits as its factorization.
109139 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 243, while the sum is 23.
The square root of 109139 is about 330.3619227453. The cubic root of 109139 is about 47.7888584760.
It can be divided in two parts, 109 and 139, that multiplied together give a palindrome (15151).
The spelling of 109139 in words is "one hundred nine thousand, one hundred thirty-nine".
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