343140397 has 2 divisors, whose sum is σ = 343140398. Its totient is φ = 343140396.

The previous prime is 343140389. The next prime is 343140419. The reversal of 343140397 is 793041343.

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., 281266441 + 61873956 = 16771^2 + 7866^2 .

It is an emirp because it is prime and its reverse (793041343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343140397 - 2³ = 343140389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343140337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171570198 + 171570199.

It is an arithmetic number, because the mean of its divisors is an integer number (171570199).

Almost surely, 2^343140397 is an apocalyptic number.

It is an amenable number.

343140397 is a deficient number, since it is larger than the sum of its proper divisors (1).

343140397 is an equidigital number, since it uses as much as digits as its factorization.

343140397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 343140397 is about 18524.0491523857. The cubic root of 343140397 is about 700.0954951351.

The spelling of 343140397 in words is "three hundred forty-three million, one hundred forty thousand, three hundred ninety-seven".