988976821321 has 2 divisors, whose sum is σ = 988976821322. Its totient is φ = 988976821320.

The previous prime is 988976821291. The next prime is 988976821361. The reversal of 988976821321 is 123128679889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 814390734096 + 174586087225 = 902436^2 + 417835^2 .

It is a cyclic number.

It is not a de Polignac number, because 988976821321 - 2⁹ = 988976820809 is a prime.

It is a super-2 number, since 2×988976821321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (988976821361) 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, 494488410660 + 494488410661.

It is an arithmetic number, because the mean of its divisors is an integer number (494488410661).

Almost surely, 2^988976821321 is an apocalyptic number.

It is an amenable number.

988976821321 is a deficient number, since it is larger than the sum of its proper divisors (1).

988976821321 is an equidigital number, since it uses as much as digits as its factorization.

988976821321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 64.

The spelling of 988976821321 in words is "nine hundred eighty-eight billion, nine hundred seventy-six million, eight hundred twenty-one thousand, three hundred twenty-one".