343661 has 2 divisors, whose sum is σ = 343662. Its totient is φ = 343660.

The previous prime is 343649. The next prime is 343667. The reversal of 343661 is 166343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175561 + 168100 = 419^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 343661 - 2¹⁴ = 327277 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 (343667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171830 + 171831.

It is an arithmetic number, because the mean of its divisors is an integer number (171831).

2³⁴³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

343661 is a deficient number, since it is larger than the sum of its proper divisors (1).

343661 is an equidigital number, since it uses as much as digits as its factorization.

343661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 343661 is about 586.2260656095. The cubic root of 343661 is about 70.0449371324.

The spelling of 343661 in words is "three hundred forty-three thousand, six hundred sixty-one".