343940393 has 2 divisors, whose sum is σ = 343940394. Its totient is φ = 343940392.

The previous prime is 343940383. The next prime is 343940417. The reversal of 343940393 is 393049343.

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., 295943209 + 47997184 = 17203^2 + 6928^2 .

It is a cyclic number.

It is not a de Polignac number, because 343940393 - 2⁶ = 343940329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (343940383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171970196 + 171970197.

It is an arithmetic number, because the mean of its divisors is an integer number (171970197).

Almost surely, 2^343940393 is an apocalyptic number.

It is an amenable number.

343940393 is a deficient number, since it is larger than the sum of its proper divisors (1).

343940393 is an equidigital number, since it uses as much as digits as its factorization.

343940393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 38.

The square root of 343940393 is about 18545.6300243481. The cubic root of 343940393 is about 700.6391393814.

The spelling of 343940393 in words is "three hundred forty-three million, nine hundred forty thousand, three hundred ninety-three".