680387 has 2 divisors, whose sum is σ = 680388. Its totient is φ = 680386.

The previous prime is 680377. The next prime is 680399. The reversal of 680387 is 783086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680387 - 2¹⁰ = 679363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (680327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340193 + 340194.

It is an arithmetic number, because the mean of its divisors is an integer number (340194).

2⁶⁸⁰³⁸⁷ is an apocalyptic number.

680387 is a deficient number, since it is larger than the sum of its proper divisors (1).

680387 is an equidigital number, since it uses as much as digits as its factorization.

680387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 680387 is about 824.8557449639. The cubic root of 680387 is about 87.9532723685.

The spelling of 680387 in words is "six hundred eighty thousand, three hundred eighty-seven".