22709 has 2 divisors, whose sum is σ = 22710. Its totient is φ = 22708.
The previous prime is 22699. The next prime is 22717. The reversal of 22709 is 90722.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 12100 + 10609 = 110^2 + 103^2 .
It is a cyclic number.
It is not a de Polignac number, because 22709 - 28 = 22453 is a prime.
It is a Chen prime.
It is a plaindrome in base 15.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22709.
It is not a weakly prime, because it can be changed into another prime (22739) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11354 + 11355.
It is an arithmetic number, because the mean of its divisors is an integer number (11355).
222709 is an apocalyptic number.
It is an amenable number.
22709 is a deficient number, since it is larger than the sum of its proper divisors (1).
22709 is an equidigital number, since it uses as much as digits as its factorization.
22709 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 252, while the sum is 20.
The square root of 22709 is about 150.6950563224. The cubic root of 22709 is about 28.3182233929.
The spelling of 22709 in words is "twenty-two thousand, seven hundred nine".
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