343806563 has 2 divisors, whose sum is σ = 343806564. Its totient is φ = 343806562.

The previous prime is 343806557. The next prime is 343806581. The reversal of 343806563 is 365608343.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 343806563 - 2¹⁸ = 343544419 is a prime.

It is not a weakly prime, because it can be changed into another prime (343806263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171903281 + 171903282.

It is an arithmetic number, because the mean of its divisors is an integer number (171903282).

Almost surely, 2^343806563 is an apocalyptic number.

343806563 is a deficient number, since it is larger than the sum of its proper divisors (1).

343806563 is an equidigital number, since it uses as much as digits as its factorization.

343806563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The square root of 343806563 is about 18542.0215456676. The cubic root of 343806563 is about 700.5482527992.

The spelling of 343806563 in words is "three hundred forty-three million, eight hundred six thousand, five hundred sixty-three".