682508621 has 2 divisors, whose sum is σ = 682508622. Its totient is φ = 682508620.

The previous prime is 682508579. The next prime is 682508653. The reversal of 682508621 is 126805286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 370986121 + 311522500 = 19261^2 + 17650^2 .

It is a cyclic number.

It is not a de Polignac number, because 682508621 - 2¹⁰ = 682507597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (682508521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341254310 + 341254311.

It is an arithmetic number, because the mean of its divisors is an integer number (341254311).

Almost surely, 2^682508621 is an apocalyptic number.

It is an amenable number.

682508621 is a deficient number, since it is larger than the sum of its proper divisors (1).

682508621 is an equidigital number, since it uses as much as digits as its factorization.

682508621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 682508621 is about 26124.8659518092. The cubic root of 682508621 is about 880.4459778862.

The spelling of 682508621 in words is "six hundred eighty-two million, five hundred eight thousand, six hundred twenty-one".