340740317 has 2 divisors, whose sum is σ = 340740318. Its totient is φ = 340740316.

The previous prime is 340740293. The next prime is 340740373. The reversal of 340740317 is 713047043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337603876 + 3136441 = 18374^2 + 1771^2 .

It is an emirp because it is prime and its reverse (713047043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340740317 - 2²⁶ = 273631453 is a prime.

It is a super-2 number, since 2×340740317² = 232207927258520978, which contains 22 as substring.

It is equal to p_18332471 and since 340740317 and 18332471 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340740317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340740017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170370158 + 170370159.

It is an arithmetic number, because the mean of its divisors is an integer number (170370159).

Almost surely, 2^340740317 is an apocalyptic number.

It is an amenable number.

340740317 is a deficient number, since it is larger than the sum of its proper divisors (1).

340740317 is an equidigital number, since it uses as much as digits as its factorization.

340740317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 340740317 is about 18459.1526620265. The cubic root of 340740317 is about 698.4594125825.

The spelling of 340740317 in words is "three hundred forty million, seven hundred forty thousand, three hundred seventeen".