345120317 has 2 divisors, whose sum is σ = 345120318. Its totient is φ = 345120316.

The previous prime is 345120311. The next prime is 345120319. The reversal of 345120317 is 713021543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284731876 + 60388441 = 16874^2 + 7771^2 .

It is a cyclic number.

It is not a de Polignac number, because 345120317 - 2⁶ = 345120253 is a prime.

Together with 345120319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345120311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172560158 + 172560159.

It is an arithmetic number, because the mean of its divisors is an integer number (172560159).

Almost surely, 2^345120317 is an apocalyptic number.

It is an amenable number.

345120317 is a deficient number, since it is larger than the sum of its proper divisors (1).

345120317 is an equidigital number, since it uses as much as digits as its factorization.

345120317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 345120317 is about 18577.4141634405. The cubic root of 345120317 is about 701.4394305449.

The spelling of 345120317 in words is "three hundred forty-five million, one hundred twenty thousand, three hundred seventeen".