683445 has 32 divisors (see below), whose sum is σ = 1308672. Its totient is φ = 297792.

The previous prime is 683437. The next prime is 683447. The reversal of 683445 is 544386.

It is not a de Polignac number, because 683445 - 2³ = 683437 is a prime.

683445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2274 + ... + 2556.

It is an arithmetic number, because the mean of its divisors is an integer number (40896).

683445 is a Friedman number, since it can be written as 8-(3-45^4)/6, using all its digits and the basic arithmetic operations.

2⁶⁸³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

683445 is a deficient number, since it is larger than the sum of its proper divisors (625227).

683445 is a wasteful number, since it uses less digits than its factorization.

683445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321.

The product of its digits is 11520, while the sum is 30.

The square root of 683445 is about 826.7073242690. The cubic root of 683445 is about 88.0848441364.

It can be divided in two parts, 683 and 445, that added together give a triangular number (1128 = T₄₇).

The spelling of 683445 in words is "six hundred eighty-three thousand, four hundred forty-five".