856099 has 2 divisors, whose sum is σ = 856100. Its totient is φ = 856098.

The previous prime is 856081. The next prime is 856111. The reversal of 856099 is 990658.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856099 is a prime.

It is not a weakly prime, because it can be changed into another prime (856699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428049 + 428050.

It is an arithmetic number, because the mean of its divisors is an integer number (428050).

2⁸⁵⁶⁰⁹⁹ is an apocalyptic number.

856099 is a deficient number, since it is larger than the sum of its proper divisors (1).

856099 is an equidigital number, since it uses as much as digits as its factorization.

856099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 856099 is about 925.2561807413. The cubic root of 856099 is about 94.9528482537.

The spelling of 856099 in words is "eight hundred fifty-six thousand, ninety-nine".