683926645 has 4 divisors (see below), whose sum is σ = 820711980. Its totient is φ = 547141312.

The previous prime is 683926627. The next prime is 683926667. The reversal of 683926645 is 546629386.

683926645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 480179569 + 203747076 = 21913^2 + 14274^2 .

It is a cyclic number.

It is not a de Polignac number, because 683926645 - 2⁵ = 683926613 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68392660 + ... + 68392669.

It is an arithmetic number, because the mean of its divisors is an integer number (205177995).

Almost surely, 2^683926645 is an apocalyptic number.

It is an amenable number.

683926645 is a deficient number, since it is larger than the sum of its proper divisors (136785335).

683926645 is a wasteful number, since it uses less digits than its factorization.

683926645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136785334.

The product of its digits is 1866240, while the sum is 49.

The square root of 683926645 is about 26151.9912243791. The cubic root of 683926645 is about 881.0553132290.

The spelling of 683926645 in words is "six hundred eighty-three million, nine hundred twenty-six thousand, six hundred forty-five".