340563647 has 2 divisors, whose sum is σ = 340563648. Its totient is φ = 340563646.

The previous prime is 340563571. The next prime is 340563649. The reversal of 340563647 is 746365043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340563647 - 2¹⁸ = 340301503 is a prime.

Together with 340563649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340563647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340563649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170281823 + 170281824.

It is an arithmetic number, because the mean of its divisors is an integer number (170281824).

Almost surely, 2^340563647 is an apocalyptic number.

340563647 is a deficient number, since it is larger than the sum of its proper divisors (1).

340563647 is an equidigital number, since it uses as much as digits as its factorization.

340563647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 38.

The square root of 340563647 is about 18454.3666106426. The cubic root of 340563647 is about 698.3386772786.

The spelling of 340563647 in words is "three hundred forty million, five hundred sixty-three thousand, six hundred forty-seven".