348406217 has 2 divisors, whose sum is σ = 348406218. Its totient is φ = 348406216.

The previous prime is 348406213. The next prime is 348406243. The reversal of 348406217 is 712604843.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304991296 + 43414921 = 17464^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 348406217 - 2² = 348406213 is a prime.

It is not a weakly prime, because it can be changed into another prime (348406213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174203108 + 174203109.

It is an arithmetic number, because the mean of its divisors is an integer number (174203109).

Almost surely, 2^348406217 is an apocalyptic number.

It is an amenable number.

348406217 is a deficient number, since it is larger than the sum of its proper divisors (1).

348406217 is an equidigital number, since it uses as much as digits as its factorization.

348406217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 348406217 is about 18665.6426891763. The cubic root of 348406217 is about 703.6585439783.

The spelling of 348406217 in words is "three hundred forty-eight million, four hundred six thousand, two hundred seventeen".