683657641 has 4 divisors (see below), whose sum is σ = 684013252. Its totient is φ = 683302032.

The previous prime is 683657617. The next prime is 683657647. The reversal of 683657641 is 146756386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 603734041 + 79923600 = 24571^2 + 8940^2 .

It is a cyclic number.

It is not a de Polignac number, because 683657641 - 2¹¹ = 683655593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 683657591 and 683657600.

It is not an unprimeable number, because it can be changed into a prime (683657647) 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, 174906 + ... + 178771.

It is an arithmetic number, because the mean of its divisors is an integer number (171003313).

Almost surely, 2^683657641 is an apocalyptic number.

It is an amenable number.

683657641 is a deficient number, since it is larger than the sum of its proper divisors (355611).

683657641 is a wasteful number, since it uses less digits than its factorization.

683657641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355610.

The product of its digits is 725760, while the sum is 46.

The square root of 683657641 is about 26146.8476302594. The cubic root of 683657641 is about 880.9397850090.

The spelling of 683657641 in words is "six hundred eighty-three million, six hundred fifty-seven thousand, six hundred forty-one".