343997 has 2 divisors, whose sum is σ = 343998. Its totient is φ = 343996.

The previous prime is 343963. The next prime is 344017. The reversal of 343997 is 799343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326041 + 17956 = 571^2 + 134^2 .

It is an emirp because it is prime and its reverse (799343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343997 - 2⁶ = 343933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171998 + 171999.

It is an arithmetic number, because the mean of its divisors is an integer number (171999).

2³⁴³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

343997 is a deficient number, since it is larger than the sum of its proper divisors (1).

343997 is an equidigital number, since it uses as much as digits as its factorization.

343997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 35.

The square root of 343997 is about 586.5125744603. The cubic root of 343997 is about 70.0677575212.

The spelling of 343997 in words is "three hundred forty-three thousand, nine hundred ninety-seven".