345693217 has 2 divisors, whose sum is σ = 345693218. Its totient is φ = 345693216.

The previous prime is 345693203. The next prime is 345693233. The reversal of 345693217 is 712396543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323424256 + 22268961 = 17984^2 + 4719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345693217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345693217.

It is not a weakly prime, because it can be changed into another prime (345693247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172846608 + 172846609.

It is an arithmetic number, because the mean of its divisors is an integer number (172846609).

Almost surely, 2^345693217 is an apocalyptic number.

It is an amenable number.

345693217 is a deficient number, since it is larger than the sum of its proper divisors (1).

345693217 is an equidigital number, since it uses as much as digits as its factorization.

345693217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 345693217 is about 18592.8270308740. The cubic root of 345693217 is about 701.8273459810.

The spelling of 345693217 in words is "three hundred forty-five million, six hundred ninety-three thousand, two hundred seventeen".