342123217 has 2 divisors, whose sum is σ = 342123218. Its totient is φ = 342123216.

The previous prime is 342123203. The next prime is 342123233. The reversal of 342123217 is 712321243.

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., 176331841 + 165791376 = 13279^2 + 12876^2 .

It is an emirp because it is prime and its reverse (712321243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342123217 is a prime.

It is a super-2 number, since 2×342123217² = 234096591220858178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 342123191 and 342123200.

It is not a weakly prime, because it can be changed into another prime (342123247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171061608 + 171061609.

It is an arithmetic number, because the mean of its divisors is an integer number (171061609).

Almost surely, 2^342123217 is an apocalyptic number.

It is an amenable number.

342123217 is a deficient number, since it is larger than the sum of its proper divisors (1).

342123217 is an equidigital number, since it uses as much as digits as its factorization.

342123217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 342123217 is about 18496.5731150394. The cubic root of 342123217 is about 699.4030400369.

The spelling of 342123217 in words is "three hundred forty-two million, one hundred twenty-three thousand, two hundred seventeen".