853999 has 2 divisors, whose sum is σ = 854000. Its totient is φ = 853998.

The previous prime is 853981. The next prime is 854017. The reversal of 853999 is 999358.

It is a balanced prime because it is at equal distance from previous prime (853981) and next prime (854017).

It is a cyclic number.

It is not a de Polignac number, because 853999 - 2¹⁹ = 329711 is a prime.

853999 is a modest number, since divided by 999 gives 853 as remainder.

853999 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426999 + 427000.

It is an arithmetic number, because the mean of its divisors is an integer number (427000).

2⁸⁵³⁹⁹⁹ is an apocalyptic number.

853999 is a deficient number, since it is larger than the sum of its proper divisors (1).

853999 is an equidigital number, since it uses as much as digits as its factorization.

853999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 853999 is about 924.1206631171. The cubic root of 853999 is about 94.8751453063.

The spelling of 853999 in words is "eight hundred fifty-three thousand, nine hundred ninety-nine".