682421809 has 2 divisors, whose sum is σ = 682421810. Its totient is φ = 682421808.

The previous prime is 682421801. The next prime is 682421813. The reversal of 682421809 is 908124286.

682421809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582981025 + 99440784 = 24145^2 + 9972^2 .

It is a cyclic number.

It is not a de Polignac number, because 682421809 - 2³ = 682421801 is a prime.

It is not a weakly prime, because it can be changed into another prime (682421801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341210904 + 341210905.

It is an arithmetic number, because the mean of its divisors is an integer number (341210905).

Almost surely, 2^682421809 is an apocalyptic number.

It is an amenable number.

682421809 is a deficient number, since it is larger than the sum of its proper divisors (1).

682421809 is an equidigital number, since it uses as much as digits as its factorization.

682421809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 682421809 is about 26123.2044167633. The cubic root of 682421809 is about 880.4086467254.

The spelling of 682421809 in words is "six hundred eighty-two million, four hundred twenty-one thousand, eight hundred nine".