683857663 has 4 divisors (see below), whose sum is σ = 690907840. Its totient is φ = 676807488.

The previous prime is 683857627. The next prime is 683857687. The reversal of 683857663 is 366758386.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683857663 is a prime.

It is a super-2 number, since 2×683857663² = 935322606487643138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 683857663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681857663) 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, 3524943 + ... + 3525136.

It is an arithmetic number, because the mean of its divisors is an integer number (172726960).

Almost surely, 2^683857663 is an apocalyptic number.

683857663 is a deficient number, since it is larger than the sum of its proper divisors (7050177).

683857663 is an equidigital number, since it uses as much as digits as its factorization.

683857663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7050176.

The product of its digits is 4354560, while the sum is 52.

The square root of 683857663 is about 26150.6723240532. The cubic root of 683857663 is about 881.0256906559.

The spelling of 683857663 in words is "six hundred eighty-three million, eight hundred fifty-seven thousand, six hundred sixty-three".