343505317 has 2 divisors, whose sum is σ = 343505318. Its totient is φ = 343505316.

The previous prime is 343505303. The next prime is 343505329. The reversal of 343505317 is 713505343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 343323841 + 181476 = 18529^2 + 426^2 .

It is a cyclic number.

It is not a de Polignac number, because 343505317 - 2⁷ = 343505189 is a prime.

It is equal to p_18473116 and since 343505317 and 18473116 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 (343505347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171752658 + 171752659.

It is an arithmetic number, because the mean of its divisors is an integer number (171752659).

Almost surely, 2^343505317 is an apocalyptic number.

It is an amenable number.

343505317 is a deficient number, since it is larger than the sum of its proper divisors (1).

343505317 is an equidigital number, since it uses as much as digits as its factorization.

343505317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 31.

The square root of 343505317 is about 18533.8964332922. The cubic root of 343505317 is about 700.3435843904.

The spelling of 343505317 in words is "three hundred forty-three million, five hundred five thousand, three hundred seventeen".