340718717 has 2 divisors, whose sum is σ = 340718718. Its totient is φ = 340718716.

The previous prime is 340718701. The next prime is 340718723. The reversal of 340718717 is 717817043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304886521 + 35832196 = 17461^2 + 5986^2 .

It is an emirp because it is prime and its reverse (717817043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340718717 - 2⁴ = 340718701 is a prime.

It is a super-2 number, since 2×340718717² = 232178488228252178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340718797) 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, 170359358 + 170359359.

It is an arithmetic number, because the mean of its divisors is an integer number (170359359).

Almost surely, 2^340718717 is an apocalyptic number.

It is an amenable number.

340718717 is a deficient number, since it is larger than the sum of its proper divisors (1).

340718717 is an equidigital number, since it uses as much as digits as its factorization.

340718717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 340718717 is about 18458.5675771442. The cubic root of 340718717 is about 698.4446535012. Note that the first 3 decimals are identical.

The spelling of 340718717 in words is "three hundred forty million, seven hundred eighteen thousand, seven hundred seventeen".