340717649 has 2 divisors, whose sum is σ = 340717650. Its totient is φ = 340717648.

The previous prime is 340717603. The next prime is 340717661. The reversal of 340717649 is 946717043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336172225 + 4545424 = 18335^2 + 2132^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340717649 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (340717679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170358824 + 170358825.

It is an arithmetic number, because the mean of its divisors is an integer number (170358825).

Almost surely, 2^340717649 is an apocalyptic number.

It is an amenable number.

340717649 is a deficient number, since it is larger than the sum of its proper divisors (1).

340717649 is an equidigital number, since it uses as much as digits as its factorization.

340717649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 340717649 is about 18458.5386474661. The cubic root of 340717649 is about 698.4439237305.

The spelling of 340717649 in words is "three hundred forty million, seven hundred seventeen thousand, six hundred forty-nine".