345285217 has 2 divisors, whose sum is σ = 345285218. Its totient is φ = 345285216.

The previous prime is 345285203. The next prime is 345285247. The reversal of 345285217 is 712582543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340623936 + 4661281 = 18456^2 + 2159^2 .

It is an emirp because it is prime and its reverse (712582543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345285217 - 2²⁷ = 211067489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345285247) 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, 172642608 + 172642609.

It is an arithmetic number, because the mean of its divisors is an integer number (172642609).

Almost surely, 2^345285217 is an apocalyptic number.

It is an amenable number.

345285217 is a deficient number, since it is larger than the sum of its proper divisors (1).

345285217 is an equidigital number, since it uses as much as digits as its factorization.

345285217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 37.

The square root of 345285217 is about 18581.8518183738. The cubic root of 345285217 is about 701.5511297013.

The spelling of 345285217 in words is "three hundred forty-five million, two hundred eighty-five thousand, two hundred seventeen".