989536919381 has 2 divisors, whose sum is σ = 989536919382. Its totient is φ = 989536919380.

The previous prime is 989536919359. The next prime is 989536919407. The reversal of 989536919381 is 183919635989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 565007788900 + 424529130481 = 751670^2 + 651559^2 .

It is a cyclic number.

It is not a de Polignac number, because 989536919381 - 2¹⁴ = 989536902997 is a prime.

It is a super-2 number, since 2×989536919381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989536919351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494768459690 + 494768459691.

It is an arithmetic number, because the mean of its divisors is an integer number (494768459691).

Almost surely, 2^989536919381 is an apocalyptic number.

It is an amenable number.

989536919381 is a deficient number, since it is larger than the sum of its proper divisors (1).

989536919381 is an equidigital number, since it uses as much as digits as its factorization.

989536919381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113374080, while the sum is 71.

The spelling of 989536919381 in words is "nine hundred eighty-nine billion, five hundred thirty-six million, nine hundred nineteen thousand, three hundred eighty-one".