340663217 has 4 divisors (see below), whose sum is σ = 358592880. Its totient is φ = 322733556.

The previous prime is 340663201. The next prime is 340663229. The reversal of 340663217 is 712366043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 712366043 = 67 ⋅10632329.

It is a cyclic number.

It is not a de Polignac number, because 340663217 - 2⁴ = 340663201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340663237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8964803 + ... + 8964840.

It is an arithmetic number, because the mean of its divisors is an integer number (89648220).

Almost surely, 2^340663217 is an apocalyptic number.

It is an amenable number.

340663217 is a deficient number, since it is larger than the sum of its proper divisors (17929663).

340663217 is a wasteful number, since it uses less digits than its factorization.

340663217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17929662.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 340663217 is about 18457.0641489918. The cubic root of 340663217 is about 698.4067280011.

The spelling of 340663217 in words is "three hundred forty million, six hundred sixty-three thousand, two hundred seventeen".