99889087 has 2 divisors, whose sum is σ = 99889088. Its totient is φ = 99889086.

The previous prime is 99889051. The next prime is 99889103. The reversal of 99889087 is 78098899.

It is a strong prime.

It is an emirp because it is prime and its reverse (78098899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99889087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99889187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944543 + 49944544.

It is an arithmetic number, because the mean of its divisors is an integer number (49944544).

Almost surely, 2^99889087 is an apocalyptic number.

99889087 is a deficient number, since it is larger than the sum of its proper divisors (1).

99889087 is an equidigital number, since it uses as much as digits as its factorization.

99889087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 99889087 is about 9994.4528114350. The cubic root of 99889087 is about 463.9872156976.

The spelling of 99889087 in words is "ninety-nine million, eight hundred eighty-nine thousand, eighty-seven".