99836981 has 2 divisors, whose sum is σ = 99836982. Its totient is φ = 99836980.

The previous prime is 99836939. The next prime is 99836983. The reversal of 99836981 is 18963899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99820081 + 16900 = 9991^2 + 130^2 .

It is an emirp because it is prime and its reverse (18963899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99836981 - 2¹⁴ = 99820597 is a prime.

It is a super-2 number, since 2×99836981² = 19934845550388722, which contains 22 as substring.

Together with 99836983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99836983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49918490 + 49918491.

It is an arithmetic number, because the mean of its divisors is an integer number (49918491).

Almost surely, 2^99836981 is an apocalyptic number.

It is an amenable number.

99836981 is a deficient number, since it is larger than the sum of its proper divisors (1).

99836981 is an equidigital number, since it uses as much as digits as its factorization.

99836981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 99836981 is about 9991.8457253903. The cubic root of 99836981 is about 463.9065237902.

The spelling of 99836981 in words is "ninety-nine million, eight hundred thirty-six thousand, nine hundred eighty-one".