343404263 has 2 divisors, whose sum is σ = 343404264. Its totient is φ = 343404262.

The previous prime is 343404239. The next prime is 343404277. The reversal of 343404263 is 362404343.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 343404263 - 2²⁶ = 276295399 is a prime.

It is a Sophie Germain 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 (343404203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171702131 + 171702132.

It is an arithmetic number, because the mean of its divisors is an integer number (171702132).

Almost surely, 2^343404263 is an apocalyptic number.

343404263 is a deficient number, since it is larger than the sum of its proper divisors (1).

343404263 is an equidigital number, since it uses as much as digits as its factorization.

343404263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 343404263 is about 18531.1700386133. The cubic root of 343404263 is about 700.2749008716.

The spelling of 343404263 in words is "three hundred forty-three million, four hundred four thousand, two hundred sixty-three".