342591217 has 2 divisors, whose sum is σ = 342591218. Its totient is φ = 342591216.

The previous prime is 342591211. The next prime is 342591241. The reversal of 342591217 is 712195243.

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., 334012176 + 8579041 = 18276^2 + 2929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342591217 is a prime.

It is a super-5 number, since 5×342591217⁵ (a number of 44 digits) contains 55555 as substring.

It is equal to p_18426652 and since 342591217 and 18426652 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (342591211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171295608 + 171295609.

It is an arithmetic number, because the mean of its divisors is an integer number (171295609).

Almost surely, 2^342591217 is an apocalyptic number.

It is an amenable number.

342591217 is a deficient number, since it is larger than the sum of its proper divisors (1).

342591217 is an equidigital number, since it uses as much as digits as its factorization.

342591217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 342591217 is about 18509.2197836646. The cubic root of 342591217 is about 699.7218057811.

The spelling of 342591217 in words is "three hundred forty-two million, five hundred ninety-one thousand, two hundred seventeen".