988976821361 has 2 divisors, whose sum is σ = 988976821362. Its totient is φ = 988976821360.

The previous prime is 988976821321. The next prime is 988976821403. The reversal of 988976821361 is 163128679889.

It is a happy number.

988976821361 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., 589355613025 + 399621208336 = 767695^2 + 632156^2 .

It is a cyclic number.

It is not a de Polignac number, because 988976821361 - 2²² = 988972627057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 988976821291 and 988976821300.

It is not a weakly prime, because it can be changed into another prime (988976821321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494488410680 + 494488410681.

It is an arithmetic number, because the mean of its divisors is an integer number (494488410681).

Almost surely, 2^988976821361 is an apocalyptic number.

It is an amenable number.

988976821361 is a deficient number, since it is larger than the sum of its proper divisors (1).

988976821361 is an equidigital number, since it uses as much as digits as its factorization.

988976821361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 68.

The spelling of 988976821361 in words is "nine hundred eighty-eight billion, nine hundred seventy-six million, eight hundred twenty-one thousand, three hundred sixty-one".