340881217 has 2 divisors, whose sum is σ = 340881218. Its totient is φ = 340881216.

The previous prime is 340881209. The next prime is 340881227. The reversal of 340881217 is 712188043.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335292721 + 5588496 = 18311^2 + 2364^2 .

It is a cyclic number.

It is not a de Polignac number, because 340881217 - 2³ = 340881209 is a prime.

It is not a weakly prime, because it can be changed into another prime (340881227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170440608 + 170440609.

It is an arithmetic number, because the mean of its divisors is an integer number (170440609).

Almost surely, 2^340881217 is an apocalyptic number.

It is an amenable number.

340881217 is a deficient number, since it is larger than the sum of its proper divisors (1).

340881217 is an equidigital number, since it uses as much as digits as its factorization.

340881217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 340881217 is about 18462.9688024434. The cubic root of 340881217 is about 698.5556729549. Note that the first 3 decimals are identical.

The spelling of 340881217 in words is "three hundred forty million, eight hundred eighty-one thousand, two hundred seventeen".