343480661 has 2 divisors, whose sum is σ = 343480662. Its totient is φ = 343480660.

The previous prime is 343480639. The next prime is 343480663. The reversal of 343480661 is 166084343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300328900 + 43151761 = 17330^2 + 6569^2 .

It is a cyclic number.

It is not a de Polignac number, because 343480661 - 2¹⁰ = 343479637 is a prime.

It is a Sophie Germain prime.

Together with 343480663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343480663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171740330 + 171740331.

It is an arithmetic number, because the mean of its divisors is an integer number (171740331).

Almost surely, 2^343480661 is an apocalyptic number.

It is an amenable number.

343480661 is a deficient number, since it is larger than the sum of its proper divisors (1).

343480661 is an equidigital number, since it uses as much as digits as its factorization.

343480661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 343480661 is about 18533.2312617093. The cubic root of 343480661 is about 700.3268276536.

The spelling of 343480661 in words is "three hundred forty-three million, four hundred eighty thousand, six hundred sixty-one".