7821093853 has 2 divisors, whose sum is σ = 7821093854. Its totient is φ = 7821093852.

The previous prime is 7821093827. The next prime is 7821093859. The reversal of 7821093853 is 3583901287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4689236484 + 3131857369 = 68478^2 + 55963^2 .

It is a cyclic number.

It is not a de Polignac number, because 7821093853 - 2⁹ = 7821093341 is a prime.

It is a super-2 number, since 2×7821093853² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7821093859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3910546926 + 3910546927.

It is an arithmetic number, because the mean of its divisors is an integer number (3910546927).

Almost surely, 2^7821093853 is an apocalyptic number.

It is an amenable number.

7821093853 is a deficient number, since it is larger than the sum of its proper divisors (1).

7821093853 is an equidigital number, since it uses as much as digits as its factorization.

7821093853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 7821093853 is about 88436.9484604710. The cubic root of 7821093853 is about 1984.9786158808.

The spelling of 7821093853 in words is "seven billion, eight hundred twenty-one million, ninety-three thousand, eight hundred fifty-three".