345424217 has 2 divisors, whose sum is σ = 345424218. Its totient is φ = 345424216.

The previous prime is 345424187. The next prime is 345424223. The reversal of 345424217 is 712424543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 317588041 + 27836176 = 17821^2 + 5276^2 .

It is a cyclic number.

It is not a de Polignac number, because 345424217 - 2⁶ = 345424153 is a prime.

It is not a weakly prime, because it can be changed into another prime (345424297) 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, 172712108 + 172712109.

It is an arithmetic number, because the mean of its divisors is an integer number (172712109).

Almost surely, 2^345424217 is an apocalyptic number.

It is an amenable number.

345424217 is a deficient number, since it is larger than the sum of its proper divisors (1).

345424217 is an equidigital number, since it uses as much as digits as its factorization.

345424217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 345424217 is about 18585.5916505233. The cubic root of 345424217 is about 701.6452572223.

The spelling of 345424217 in words is "three hundred forty-five million, four hundred twenty-four thousand, two hundred seventeen".