861803 has 2 divisors, whose sum is σ = 861804. Its totient is φ = 861802.

The previous prime is 861799. The next prime is 861823. The reversal of 861803 is 308168.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 861803 - 2² = 861799 is a prime.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861803.

It is not a weakly prime, because it can be changed into another prime (861823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430901 + 430902.

It is an arithmetic number, because the mean of its divisors is an integer number (430902).

2⁸⁶¹⁸⁰³ is an apocalyptic number.

861803 is a deficient number, since it is larger than the sum of its proper divisors (1).

861803 is an equidigital number, since it uses as much as digits as its factorization.

861803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 861803 is about 928.3334530221. Note that the first 3 decimals coincide. The cubic root of 861803 is about 95.1632649620.

The spelling of 861803 in words is "eight hundred sixty-one thousand, eight hundred three".