340687 has 2 divisors, whose sum is σ = 340688. Its totient is φ = 340686.

The previous prime is 340661. The next prime is 340693. The reversal of 340687 is 786043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340687 - 2⁷ = 340559 is a prime.

340687 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170343 + 170344.

It is an arithmetic number, because the mean of its divisors is an integer number (170344).

2³⁴⁰⁶⁸⁷ is an apocalyptic number.

340687 is a deficient number, since it is larger than the sum of its proper divisors (1).

340687 is an equidigital number, since it uses as much as digits as its factorization.

340687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 340687 is about 583.6839898438. The cubic root of 340687 is about 69.8422980436.

The spelling of 340687 in words is "three hundred forty thousand, six hundred eighty-seven".