340839217 has 4 divisors (see below), whose sum is σ = 340971300. Its totient is φ = 340707136.

The previous prime is 340839211. The next prime is 340839223. The reversal of 340839217 is 712938043.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (340839211) and next prime (340839223).

It can be written as a sum of positive squares in 2 ways, for example, as 28398241 + 312440976 = 5329^2 + 17676^2 .

It is a cyclic number.

It is not a de Polignac number, because 340839217 - 2³ = 340839209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340839211) 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, 62092 + ... + 67357.

It is an arithmetic number, because the mean of its divisors is an integer number (85242825).

Almost surely, 2^340839217 is an apocalyptic number.

It is an amenable number.

340839217 is a deficient number, since it is larger than the sum of its proper divisors (132083).

340839217 is a wasteful number, since it uses less digits than its factorization.

340839217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132082.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 340839217 is about 18461.8313555292. The cubic root of 340839217 is about 698.5269820778.

It can be divided in two parts, 340839 and 217, that added together give a square (341056 = 584²).

The spelling of 340839217 in words is "three hundred forty million, eight hundred thirty-nine thousand, two hundred seventeen".