340563649 has 2 divisors, whose sum is σ = 340563650. Its totient is φ = 340563648.

The previous prime is 340563647. The next prime is 340563653. The reversal of 340563649 is 946365043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319265424 + 21298225 = 17868^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 340563649 - 2¹ = 340563647 is a prime.

Together with 340563647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (340563647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170281824 + 170281825.

It is an arithmetic number, because the mean of its divisors is an integer number (170281825).

Almost surely, 2^340563649 is an apocalyptic number.

It is an amenable number.

340563649 is a deficient number, since it is larger than the sum of its proper divisors (1).

340563649 is an equidigital number, since it uses as much as digits as its factorization.

340563649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

The square root of 340563649 is about 18454.3666648303. The cubic root of 340563649 is about 698.3386786456.

The spelling of 340563649 in words is "three hundred forty million, five hundred sixty-three thousand, six hundred forty-nine".