8849879821 has 2 divisors, whose sum is σ = 8849879822. Its totient is φ = 8849879820.

The previous prime is 8849879767. The next prime is 8849879833. The reversal of 8849879821 is 1289789488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8133514596 + 716365225 = 90186^2 + 26765^2 .

It is a cyclic number.

It is not a de Polignac number, because 8849879821 - 2⁹ = 8849879309 is a prime.

It is a super-2 number, since 2×8849879821² (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 (8849879021) 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, 4424939910 + 4424939911.

It is an arithmetic number, because the mean of its divisors is an integer number (4424939911).

Almost surely, 2^8849879821 is an apocalyptic number.

It is an amenable number.

8849879821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8849879821 is an equidigital number, since it uses as much as digits as its factorization.

8849879821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18579456, while the sum is 64.

The square root of 8849879821 is about 94073.7998647870. The cubic root of 8849879821 is about 2068.4536375892.

The spelling of 8849879821 in words is "eight billion, eight hundred forty-nine million, eight hundred seventy-nine thousand, eight hundred twenty-one".