687230387 has 2 divisors, whose sum is σ = 687230388. Its totient is φ = 687230386.

The previous prime is 687230359. The next prime is 687230417. The reversal of 687230387 is 783032786.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687230387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (687239387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343615193 + 343615194.

It is an arithmetic number, because the mean of its divisors is an integer number (343615194).

Almost surely, 2^687230387 is an apocalyptic number.

687230387 is a deficient number, since it is larger than the sum of its proper divisors (1).

687230387 is an equidigital number, since it uses as much as digits as its factorization.

687230387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 687230387 is about 26215.0793819130. The cubic root of 687230387 is about 882.4716956791.

The spelling of 687230387 in words is "six hundred eighty-seven million, two hundred thirty thousand, three hundred eighty-seven".