345233309 has 2 divisors, whose sum is σ = 345233310. Its totient is φ = 345233308.

The previous prime is 345233293. The next prime is 345233321. The reversal of 345233309 is 903332543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205922500 + 139310809 = 14350^2 + 11803^2 .

It is a cyclic number.

It is not a de Polignac number, because 345233309 - 2⁴ = 345233293 is a prime.

It is a Chen prime.

It is equal to p_18561182 and since 345233309 and 18561182 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345233389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172616654 + 172616655.

It is an arithmetic number, because the mean of its divisors is an integer number (172616655).

Almost surely, 2^345233309 is an apocalyptic number.

It is an amenable number.

345233309 is a deficient number, since it is larger than the sum of its proper divisors (1).

345233309 is an equidigital number, since it uses as much as digits as its factorization.

345233309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 32.

The square root of 345233309 is about 18580.4550267210. The cubic root of 345233309 is about 701.5159723500.

The spelling of 345233309 in words is "three hundred forty-five million, two hundred thirty-three thousand, three hundred nine".