99889143 has 4 divisors (see below), whose sum is σ = 133185528. Its totient is φ = 66592760.

The previous prime is 99889121. The next prime is 99889151. The reversal of 99889143 is 34198899.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99889143 - 2⁹ = 99888631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99889103) 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 in 3 ways as a sum of consecutive naturals, for example, 16648188 + ... + 16648193.

It is an arithmetic number, because the mean of its divisors is an integer number (33296382).

Almost surely, 2^99889143 is an apocalyptic number.

99889143 is a deficient number, since it is larger than the sum of its proper divisors (33296385).

99889143 is a wasteful number, since it uses less digits than its factorization.

99889143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33296384.

The product of its digits is 559872, while the sum is 51.

The square root of 99889143 is about 9994.4556129886. The cubic root of 99889143 is about 463.9873024047.

The spelling of 99889143 in words is "ninety-nine million, eight hundred eighty-nine thousand, one hundred forty-three".