683861 has 2 divisors, whose sum is σ = 683862. Its totient is φ = 683860.

The previous prime is 683857. The next prime is 683863. The reversal of 683861 is 168386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 34225 = 806^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 683861 - 2² = 683857 is a prime.

Together with 683863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 683861.

It is not a weakly prime, because it can be changed into another prime (683863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341930 + 341931.

It is an arithmetic number, because the mean of its divisors is an integer number (341931).

2⁶⁸³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

683861 is a deficient number, since it is larger than the sum of its proper divisors (1).

683861 is an equidigital number, since it uses as much as digits as its factorization.

683861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 683861 is about 826.9588865234. The cubic root of 683861 is about 88.1027123692.

The spelling of 683861 in words is "six hundred eighty-three thousand, eight hundred sixty-one".