343936561 has 2 divisors, whose sum is σ = 343936562. Its totient is φ = 343936560.

The previous prime is 343936559. The next prime is 343936589. The reversal of 343936561 is 165639343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319730161 + 24206400 = 17881^2 + 4920^2 .

It is a cyclic number.

It is not a de Polignac number, because 343936561 - 2¹ = 343936559 is a prime.

Together with 343936559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343936501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171968280 + 171968281.

It is an arithmetic number, because the mean of its divisors is an integer number (171968281).

Almost surely, 2^343936561 is an apocalyptic number.

It is an amenable number.

343936561 is a deficient number, since it is larger than the sum of its proper divisors (1).

343936561 is an equidigital number, since it uses as much as digits as its factorization.

343936561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 40.

The square root of 343936561 is about 18545.5267113124. The cubic root of 343936561 is about 700.6365373228.

It can be divided in two parts, 3439 and 36561, that added together give a square (40000 = 200²).

The spelling of 343936561 in words is "three hundred forty-three million, nine hundred thirty-six thousand, five hundred sixty-one".