682403821 has 12 divisors (see below), whose sum is σ = 751968700. Its totient is φ = 618805440.

The previous prime is 682403819. The next prime is 682403831. The reversal of 682403821 is 128304286.

It can be written as a sum of positive squares in 2 ways, for example, as 645668100 + 36735721 = 25410^2 + 6061^2 .

It is not a de Polignac number, because 682403821 - 2¹ = 682403819 is a prime.

It is a super-3 number, since 3×682403821³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682403801) 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 in 11 ways as a sum of consecutive naturals, for example, 42595 + ... + 56383.

Almost surely, 2^682403821 is an apocalyptic number.

It is an amenable number.

682403821 is a deficient number, since it is larger than the sum of its proper divisors (69564879).

682403821 is a wasteful number, since it uses less digits than its factorization.

682403821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220 (or 14209 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 682403821 is about 26122.8601228885. The cubic root of 682403821 is about 880.4009110749.

The spelling of 682403821 in words is "six hundred eighty-two million, four hundred three thousand, eight hundred twenty-one".