343280261 has 2 divisors, whose sum is σ = 343280262. Its totient is φ = 343280260.

The previous prime is 343280177. The next prime is 343280263. The reversal of 343280261 is 162082343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175059361 + 168220900 = 13231^2 + 12970^2 .

It is a cyclic number.

It is not a de Polignac number, because 343280261 - 2²⁶ = 276171397 is a prime.

Together with 343280263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343280263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171640130 + 171640131.

It is an arithmetic number, because the mean of its divisors is an integer number (171640131).

Almost surely, 2^343280261 is an apocalyptic number.

It is an amenable number.

343280261 is a deficient number, since it is larger than the sum of its proper divisors (1).

343280261 is an equidigital number, since it uses as much as digits as its factorization.

343280261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 343280261 is about 18527.8239682916. The cubic root of 343280261 is about 700.1906018381.

The spelling of 343280261 in words is "three hundred forty-three million, two hundred eighty thousand, two hundred sixty-one".