687382349 has 2 divisors, whose sum is σ = 687382350. Its totient is φ = 687382348.

The previous prime is 687382309. The next prime is 687382441. The reversal of 687382349 is 943283786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624100324 + 63282025 = 24982^2 + 7955^2 .

It is a cyclic number.

It is not a de Polignac number, because 687382349 - 2¹⁶ = 687316813 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 687382297 and 687382306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687382309) 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, 343691174 + 343691175.

It is an arithmetic number, because the mean of its divisors is an integer number (343691175).

Almost surely, 2^687382349 is an apocalyptic number.

It is an amenable number.

687382349 is a deficient number, since it is larger than the sum of its proper divisors (1).

687382349 is an equidigital number, since it uses as much as digits as its factorization.

687382349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 50.

The square root of 687382349 is about 26217.9775917213. The cubic root of 687382349 is about 882.5367356246.

The spelling of 687382349 in words is "six hundred eighty-seven million, three hundred eighty-two thousand, three hundred forty-nine".