683383021 has 4 divisors (see below), whose sum is σ = 689652700. Its totient is φ = 677113344.

The previous prime is 683383009. The next prime is 683383027. The reversal of 683383021 is 120383386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120383386 = 2 ⋅60191693.

It can be written as a sum of positive squares in 2 ways, for example, as 291897225 + 391485796 = 17085^2 + 19786^2 .

It is a cyclic number.

It is not a de Polignac number, because 683383021 - 2¹³ = 683374829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683383027) 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 3 ways as a sum of consecutive naturals, for example, 3134676 + ... + 3134893.

It is an arithmetic number, because the mean of its divisors is an integer number (172413175).

Almost surely, 2^683383021 is an apocalyptic number.

It is an amenable number.

683383021 is a deficient number, since it is larger than the sum of its proper divisors (6269679).

683383021 is a wasteful number, since it uses less digits than its factorization.

683383021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6269678.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 683383021 is about 26141.5956092967. The cubic root of 683383021 is about 880.8218136398.

The spelling of 683383021 in words is "six hundred eighty-three million, three hundred eighty-three thousand, twenty-one".