682128609 has 4 divisors (see below), whose sum is σ = 909504816. Its totient is φ = 454752404.

The previous prime is 682128593. The next prime is 682128647. The reversal of 682128609 is 906821286.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 682128609 - 2⁴ = 682128593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (682126609) 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 in 3 ways as a sum of consecutive naturals, for example, 113688099 + ... + 113688104.

It is an arithmetic number, because the mean of its divisors is an integer number (227376204).

Almost surely, 2^682128609 is an apocalyptic number.

It is an amenable number.

682128609 is a deficient number, since it is larger than the sum of its proper divisors (227376207).

682128609 is a wasteful number, since it uses less digits than its factorization.

682128609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227376206.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 682128609 is about 26117.5919448942. The cubic root of 682128609 is about 880.2825405598.

The spelling of 682128609 in words is "six hundred eighty-two million, one hundred twenty-eight thousand, six hundred nine".