9896828621 has 2 divisors, whose sum is σ = 9896828622. Its totient is φ = 9896828620.

The previous prime is 9896828609. The next prime is 9896828651. The reversal of 9896828621 is 1268286989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9501375625 + 395452996 = 97475^2 + 19886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9896828621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9896828651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948414310 + 4948414311.

It is an arithmetic number, because the mean of its divisors is an integer number (4948414311).

Almost surely, 2^9896828621 is an apocalyptic number.

It is an amenable number.

9896828621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9896828621 is an equidigital number, since it uses as much as digits as its factorization.

9896828621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 59.

The square root of 9896828621 is about 99482.8056550477. The cubic root of 9896828621 is about 2146.9998624612. Note that the first 3 decimals are identical.

The spelling of 9896828621 in words is "nine billion, eight hundred ninety-six million, eight hundred twenty-eight thousand, six hundred twenty-one".