2085699851 has 2 divisors, whose sum is σ = 2085699852. Its totient is φ = 2085699850.

The previous prime is 2085699829. The next prime is 2085699881. The reversal of 2085699851 is 1589965802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2085699851 - 2¹⁰ = 2085698827 is a prime.

It is a super-2 number, since 2×2085699851² = 8700287736922844402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2085699793 and 2085699802.

It is not a weakly prime, because it can be changed into another prime (2085699881) 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, 1042849925 + 1042849926.

It is an arithmetic number, because the mean of its divisors is an integer number (1042849926).

Almost surely, 2^2085699851 is an apocalyptic number.

2085699851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2085699851 is an equidigital number, since it uses as much as digits as its factorization.

2085699851 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 53.

The square root of 2085699851 is about 45669.4630031928. The cubic root of 2085699851 is about 1277.6658002772.

The spelling of 2085699851 in words is "two billion, eighty-five million, six hundred ninety-nine thousand, eight hundred fifty-one".