136709 has 2 divisors, whose sum is σ = 136710.
Its totient is φ = 136708.
The previous prime is 136693. The next prime is 136711. The reversal of 136709 is 907631.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 124609 + 12100 = 353^2 + 110^2
It is a cyclic number.
It is not a de Polignac number, because 136709 - 24 = 136693 is a prime.
Together with 136711, it forms a pair of twin primes.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (136739) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68354 + 68355.
It is an arithmetic number, because the mean of its divisors is an integer number (68355).
2136709 is an apocalyptic number.
It is an amenable number.
136709 is a deficient number, since it is larger than the sum of its proper divisors (1).
136709 is an equidigital number, since it uses as much as digits as its factorization.
136709 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1134, while the sum is 26.
The square root of 136709 is about 369.7418018023.
The cubic root of 136709 is about 51.5148416080.
The spelling of 136709 in words is "one hundred thirty-six thousand, seven hundred nine".