683521 has 4 divisors (see below), whose sum is σ = 698112. Its totient is φ = 668932.

The previous prime is 683513. The next prime is 683567. The reversal of 683521 is 125386.

It is a happy number.

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 683521 - 2³ = 683513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (683591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7225 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (174528).

2⁶⁸³⁵²¹ is an apocalyptic number.

It is an amenable number.

683521 is a deficient number, since it is larger than the sum of its proper divisors (14591).

683521 is a wasteful number, since it uses less digits than its factorization.

683521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14590.

The product of its digits is 1440, while the sum is 25.

The square root of 683521 is about 826.7532884724. The cubic root of 683521 is about 88.0881090663.

The spelling of 683521 in words is "six hundred eighty-three thousand, five hundred twenty-one".