683811638 has 8 divisors (see below), whose sum is σ = 1086053832. Its totient is φ = 321793696.

The previous prime is 683811637. The next prime is 683811679. The reversal of 683811638 is 836118386.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683811631) 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, 10056020 + ... + 10056087.

It is an arithmetic number, because the mean of its divisors is an integer number (135756729).

Almost surely, 2^683811638 is an apocalyptic number.

683811638 is a deficient number, since it is larger than the sum of its proper divisors (402242194).

683811638 is a wasteful number, since it uses less digits than its factorization.

683811638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112126.

The product of its digits is 165888, while the sum is 44.

The square root of 683811638 is about 26149.7923127508. The cubic root of 683811638 is about 881.0059252772.

The spelling of 683811638 in words is "six hundred eighty-three million, eight hundred eleven thousand, six hundred thirty-eight".