343650209909 has 2 divisors, whose sum is σ = 343650209910. Its totient is φ = 343650209908.

The previous prime is 343650209897. The next prime is 343650209951. The reversal of 343650209909 is 909902056343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304731600625 + 38918609284 = 552025^2 + 197278^2 .

It is a cyclic number.

It is not a de Polignac number, because 343650209909 - 2¹⁶ = 343650144373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343650289909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171825104954 + 171825104955.

It is an arithmetic number, because the mean of its divisors is an integer number (171825104955).

Almost surely, 2^343650209909 is an apocalyptic number.

It is an amenable number.

343650209909 is a deficient number, since it is larger than the sum of its proper divisors (1).

343650209909 is an equidigital number, since it uses as much as digits as its factorization.

343650209909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 50.

The spelling of 343650209909 in words is "three hundred forty-three billion, six hundred fifty million, two hundred nine thousand, nine hundred nine".