99983861 has 2 divisors, whose sum is σ = 99983862. Its totient is φ = 99983860.

The previous prime is 99983837. The next prime is 99983867. The reversal of 99983861 is 16838999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57668836 + 42315025 = 7594^2 + 6505^2 .

It is a cyclic number.

It is not a de Polignac number, because 99983861 - 2⁶ = 99983797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99983867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49991930 + 49991931.

It is an arithmetic number, because the mean of its divisors is an integer number (49991931).

Almost surely, 2^99983861 is an apocalyptic number.

It is an amenable number.

99983861 is a deficient number, since it is larger than the sum of its proper divisors (1).

99983861 is an equidigital number, since it uses as much as digits as its factorization.

99983861 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 99983861 is about 9999.1930174390. The cubic root of 99983861 is about 464.1339118171.

The spelling of 99983861 in words is "ninety-nine million, nine hundred eighty-three thousand, eight hundred sixty-one".