345420017 has 2 divisors, whose sum is σ = 345420018. Its totient is φ = 345420016.

The previous prime is 345419993. The next prime is 345420029. The reversal of 345420017 is 710024543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343879936 + 1540081 = 18544^2 + 1241^2 .

It is an emirp because it is prime and its reverse (710024543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345420017 - 2⁶ = 345419953 is a prime.

It is not a weakly prime, because it can be changed into another prime (345420077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172710008 + 172710009.

It is an arithmetic number, because the mean of its divisors is an integer number (172710009).

Almost surely, 2^345420017 is an apocalyptic number.

It is an amenable number.

345420017 is a deficient number, since it is larger than the sum of its proper divisors (1).

345420017 is an equidigital number, since it uses as much as digits as its factorization.

345420017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 345420017 is about 18585.4786594266. The cubic root of 345420017 is about 701.6424134513.

The spelling of 345420017 in words is "three hundred forty-five million, four hundred twenty thousand, seventeen".