340397 has 2 divisors, whose sum is σ = 340398. Its totient is φ = 340396.

The previous prime is 340393. The next prime is 340409. The reversal of 340397 is 793043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175561 + 164836 = 419^2 + 406^2 .

It is an emirp because it is prime and its reverse (793043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340397 - 2² = 340393 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340397.

It is not a weakly prime, because it can be changed into another prime (340393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170198 + 170199.

It is an arithmetic number, because the mean of its divisors is an integer number (170199).

2³⁴⁰³⁹⁷ is an apocalyptic number.

It is an amenable number.

340397 is a deficient number, since it is larger than the sum of its proper divisors (1).

340397 is an equidigital number, since it uses as much as digits as its factorization.

340397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 340397 is about 583.4355148600. The cubic root of 340397 is about 69.8224753363.

It can be divided in two parts, 340 and 397, that added together give a palindrome (737).

The spelling of 340397 in words is "three hundred forty thousand, three hundred ninety-seven".