856582099 has 2 divisors, whose sum is σ = 856582100. Its totient is φ = 856582098.

The previous prime is 856582087. The next prime is 856582117. The reversal of 856582099 is 990285658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856582099 - 2⁹ = 856581587 is a prime.

It is not a weakly prime, because it can be changed into another prime (856582999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428291049 + 428291050.

It is an arithmetic number, because the mean of its divisors is an integer number (428291050).

Almost surely, 2^856582099 is an apocalyptic number.

856582099 is a deficient number, since it is larger than the sum of its proper divisors (1).

856582099 is an equidigital number, since it uses as much as digits as its factorization.

856582099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The square root of 856582099 is about 29267.4238531511. The cubic root of 856582099 is about 949.7070561216.

The spelling of 856582099 in words is "eight hundred fifty-six million, five hundred eighty-two thousand, ninety-nine".