345233209 has 2 divisors, whose sum is σ = 345233210. Its totient is φ = 345233208.

The previous prime is 345233179. The next prime is 345233257. The reversal of 345233209 is 902332543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197683600 + 147549609 = 14060^2 + 12147^2 .

It is a cyclic number.

It is not a de Polignac number, because 345233209 - 2⁹ = 345232697 is a prime.

It is not a weakly prime, because it can be changed into another prime (345233309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172616604 + 172616605.

It is an arithmetic number, because the mean of its divisors is an integer number (172616605).

Almost surely, 2^345233209 is an apocalyptic number.

It is an amenable number.

345233209 is a deficient number, since it is larger than the sum of its proper divisors (1).

345233209 is an equidigital number, since it uses as much as digits as its factorization.

345233209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 345233209 is about 18580.4523357210. The cubic root of 345233209 is about 701.5159046165.

The spelling of 345233209 in words is "three hundred forty-five million, two hundred thirty-three thousand, two hundred nine".