6981200069 has 2 divisors, whose sum is σ = 6981200070. Its totient is φ = 6981200068.

The previous prime is 6981200047. The next prime is 6981200089. The reversal of 6981200069 is 9600021896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6603675169 + 377524900 = 81263^2 + 19430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6981200069 is a prime.

It is a super-2 number, since 2×6981200069² = 97474308806811209522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6981199999 and 6981200035.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6981200029) 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, 3490600034 + 3490600035.

It is an arithmetic number, because the mean of its divisors is an integer number (3490600035).

Almost surely, 2^6981200069 is an apocalyptic number.

It is an amenable number.

6981200069 is a deficient number, since it is larger than the sum of its proper divisors (1).

6981200069 is an equidigital number, since it uses as much as digits as its factorization.

6981200069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 6981200069 is about 83553.5760395688. The cubic root of 6981200069 is about 1911.2171247879.

The spelling of 6981200069 in words is "six billion, nine hundred eighty-one million, two hundred thousand, sixty-nine".