683681445 has 16 divisors (see below), whose sum is σ = 1215433920. Its totient is φ = 364630032.

The previous prime is 683681441. The next prime is 683681447. The reversal of 683681445 is 544186386.

It is not a de Polignac number, because 683681445 - 2² = 683681441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 683681445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683681441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2532019 + ... + 2532288.

It is an arithmetic number, because the mean of its divisors is an integer number (75964620).

Almost surely, 2^683681445 is an apocalyptic number.

It is an amenable number.

683681445 is a deficient number, since it is larger than the sum of its proper divisors (531752475).

683681445 is a wasteful number, since it uses less digits than its factorization.

683681445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5064321 (or 5064315 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 683681445 is about 26147.3028245745. The cubic root of 683681445 is about 880.9500092528.

The spelling of 683681445 in words is "six hundred eighty-three million, six hundred eighty-one thousand, four hundred forty-five".