687873323 has 2 divisors, whose sum is σ = 687873324. Its totient is φ = 687873322.

The previous prime is 687873317. The next prime is 687873349. The reversal of 687873323 is 323378786.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687873323 - 2¹⁶ = 687807787 is a prime.

It is not a weakly prime, because it can be changed into another prime (687873383) 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, 343936661 + 343936662.

It is an arithmetic number, because the mean of its divisors is an integer number (343936662).

Almost surely, 2^687873323 is an apocalyptic number.

687873323 is a deficient number, since it is larger than the sum of its proper divisors (1).

687873323 is an equidigital number, since it uses as much as digits as its factorization.

687873323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 47.

The square root of 687873323 is about 26227.3392283701. The cubic root of 687873323 is about 882.7468076795.

The spelling of 687873323 in words is "six hundred eighty-seven million, eight hundred seventy-three thousand, three hundred twenty-three".