340256443 has 2 divisors, whose sum is σ = 340256444. Its totient is φ = 340256442.

The previous prime is 340256419. The next prime is 340256459. The reversal of 340256443 is 344652043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340256443 - 2⁹ = 340255931 is a prime.

It is not a weakly prime, because it can be changed into another prime (340256473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170128221 + 170128222.

It is an arithmetic number, because the mean of its divisors is an integer number (170128222).

Almost surely, 2^340256443 is an apocalyptic number.

340256443 is a deficient number, since it is larger than the sum of its proper divisors (1).

340256443 is an equidigital number, since it uses as much as digits as its factorization.

340256443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 340256443 is about 18446.0413910411. The cubic root of 340256443 is about 698.1286362919.

The spelling of 340256443 in words is "three hundred forty million, two hundred fifty-six thousand, four hundred forty-three".