133109 has 2 divisors, whose sum is σ = 133110. Its totient is φ = 133108.
The previous prime is 133103. The next prime is 133117. The reversal of 133109 is 901331.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 122500 + 10609 = 350^2 + 103^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-133109 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (133103) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66554 + 66555.
It is an arithmetic number, because the mean of its divisors is an integer number (66555).
2133109 is an apocalyptic number.
It is an amenable number.
133109 is a deficient number, since it is larger than the sum of its proper divisors (1).
133109 is an equidigital number, since it uses as much as digits as its factorization.
133109 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 81, while the sum is 17.
The square root of 133109 is about 364.8410612856. The cubic root of 133109 is about 51.0586279510.
It can be divided in two parts, 133 and 109, that added together give a palindrome (242).
The spelling of 133109 in words is "one hundred thirty-three thousand, one hundred nine".
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