340709217 has 16 divisors (see below), whose sum is σ = 462887040. Its totient is φ = 222854400.

The previous prime is 340709207. The next prime is 340709219. The reversal of 340709217 is 712907043.

It is not a de Polignac number, because 340709217 - 2⁶ = 340709153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340709219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78217 + ... + 82457.

It is an arithmetic number, because the mean of its divisors is an integer number (28930440).

Almost surely, 2^340709217 is an apocalyptic number.

It is an amenable number.

340709217 is a deficient number, since it is larger than the sum of its proper divisors (122177823).

340709217 is a wasteful number, since it uses less digits than its factorization.

340709217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4744.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 340709217 is about 18458.3102422730. The cubic root of 340709217 is about 698.4381620411.

The spelling of 340709217 in words is "three hundred forty million, seven hundred nine thousand, two hundred seventeen".