340044209 has 2 divisors, whose sum is σ = 340044210. Its totient is φ = 340044208.

The previous prime is 340044163. The next prime is 340044241. The reversal of 340044209 is 902440043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340033600 + 10609 = 18440^2 + 103^2 .

It is an emirp because it is prime and its reverse (902440043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340044209 - 2⁸ = 340043953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340044109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170022104 + 170022105.

It is an arithmetic number, because the mean of its divisors is an integer number (170022105).

Almost surely, 2^340044209 is an apocalyptic number.

It is an amenable number.

340044209 is a deficient number, since it is larger than the sum of its proper divisors (1).

340044209 is an equidigital number, since it uses as much as digits as its factorization.

340044209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 340044209 is about 18440.2876604461. The cubic root of 340044209 is about 697.9834541771.

The spelling of 340044209 in words is "three hundred forty million, forty-four thousand, two hundred nine".