9876523121 has 2 divisors, whose sum is σ = 9876523122. Its totient is φ = 9876523120.

The previous prime is 9876523103. The next prime is 9876523159. The reversal of 9876523121 is 1213256789.

9876523121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8321088400 + 1555434721 = 91220^2 + 39439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9876523121 is a prime.

It is not a weakly prime, because it can be changed into another prime (9876523021) 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, 4938261560 + 4938261561.

It is an arithmetic number, because the mean of its divisors is an integer number (4938261561).

Almost surely, 2^9876523121 is an apocalyptic number.

It is an amenable number.

9876523121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9876523121 is an equidigital number, since it uses as much as digits as its factorization.

9876523121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 9876523121 is about 99380.6979297288. The cubic root of 9876523121 is about 2145.5305111195.

The spelling of 9876523121 in words is "nine billion, eight hundred seventy-six million, five hundred twenty-three thousand, one hundred twenty-one".