7882116421 has 2 divisors, whose sum is σ = 7882116422. Its totient is φ = 7882116420.

The previous prime is 7882116413. The next prime is 7882116461. The reversal of 7882116421 is 1246112887.

It is an a-pointer prime, because the next prime (7882116461) can be obtained adding 7882116421 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7816328100 + 65788321 = 88410^2 + 8111^2 .

It is an emirp because it is prime and its reverse (1246112887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7882116421 - 2³ = 7882116413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7882116461) 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, 3941058210 + 3941058211.

It is an arithmetic number, because the mean of its divisors is an integer number (3941058211).

Almost surely, 2^7882116421 is an apocalyptic number.

It is an amenable number.

7882116421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7882116421 is an equidigital number, since it uses as much as digits as its factorization.

7882116421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 40.

The square root of 7882116421 is about 88781.2841819716. The cubic root of 7882116421 is about 1990.1277176179.

The spelling of 7882116421 in words is "seven billion, eight hundred eighty-two million, one hundred sixteen thousand, four hundred twenty-one".