2116985669 has 2 divisors, whose sum is σ = 2116985670. Its totient is φ = 2116985668.

The previous prime is 2116985621. The next prime is 2116985701. The reversal of 2116985669 is 9665896112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2114620225 + 2365444 = 45985^2 + 1538^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116985669 - 2¹⁶ = 2116920133 is a prime.

It is a super-2 number, since 2×2116985669² = 8963256645502755122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2116985669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116985569) 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, 1058492834 + 1058492835.

It is an arithmetic number, because the mean of its divisors is an integer number (1058492835).

Almost surely, 2^2116985669 is an apocalyptic number.

It is an amenable number.

2116985669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116985669 is an equidigital number, since it uses as much as digits as its factorization.

2116985669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 53.

The square root of 2116985669 is about 46010.7125461017. The cubic root of 2116985669 is about 1284.0225159255.

The spelling of 2116985669 in words is "two billion, one hundred sixteen million, nine hundred eighty-five thousand, six hundred sixty-nine".