340387 has 2 divisors, whose sum is σ = 340388. Its totient is φ = 340386.

The previous prime is 340381. The next prime is 340393. The reversal of 340387 is 783043.

It is a balanced prime because it is at equal distance from previous prime (340381) and next prime (340393).

It is an emirp because it is prime and its reverse (783043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340387 - 2¹¹ = 338339 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340387.

It is not a weakly prime, because it can be changed into another prime (340381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170193 + 170194.

It is an arithmetic number, because the mean of its divisors is an integer number (170194).

2³⁴⁰³⁸⁷ is an apocalyptic number.

340387 is a deficient number, since it is larger than the sum of its proper divisors (1).

340387 is an equidigital number, since it uses as much as digits as its factorization.

340387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 340387 is about 583.4269448697. The cubic root of 340387 is about 69.8217915939.

It can be divided in two parts, 340 and 387, that added together give a palindrome (727).

The spelling of 340387 in words is "three hundred forty thousand, three hundred eighty-seven".