343649 has 2 divisors, whose sum is σ = 343650. Its totient is φ = 343648.

The previous prime is 343639. The next prime is 343661. The reversal of 343649 is 946343.

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., 322624 + 21025 = 568^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 343649 - 2⁸ = 343393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343649.

It is not a weakly prime, because it can be changed into another prime (343639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171824 + 171825.

It is an arithmetic number, because the mean of its divisors is an integer number (171825).

2³⁴³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

343649 is a deficient number, since it is larger than the sum of its proper divisors (1).

343649 is an equidigital number, since it uses as much as digits as its factorization.

343649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 343649 is about 586.2158305607. The cubic root of 343649 is about 70.0441218435.

The spelling of 343649 in words is "three hundred forty-three thousand, six hundred forty-nine".