99881087 has 2 divisors, whose sum is σ = 99881088. Its totient is φ = 99881086.

The previous prime is 99881077. The next prime is 99881099. The reversal of 99881087 is 78018899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99881087 - 2¹⁰ = 99880063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99881027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49940543 + 49940544.

It is an arithmetic number, because the mean of its divisors is an integer number (49940544).

Almost surely, 2^99881087 is an apocalyptic number.

99881087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99881087 is an equidigital number, since it uses as much as digits as its factorization.

99881087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 50.

The square root of 99881087 is about 9994.0525814106. The cubic root of 99881087 is about 463.9748286360.

The spelling of 99881087 in words is "ninety-nine million, eight hundred eighty-one thousand, eighty-seven".