99999886 has 12 divisors (see below), whose sum is σ = 174489768. Its totient is φ = 42857052.

The previous prime is 99999847. The next prime is 99999931. The reversal of 99999886 is 68899999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510106 + ... + 510301.

It is an arithmetic number, because the mean of its divisors is an integer number (14540814).

Almost surely, 2^99999886 is an apocalyptic number.

99999886 is a deficient number, since it is larger than the sum of its proper divisors (74489882).

99999886 is a wasteful number, since it uses less digits than its factorization.

99999886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020423 (or 1020416 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 67.

The square root of 99999886 is about 9999.9942999984. The cubic root of 99999886 is about 464.1587069808.

The spelling of 99999886 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred eighty-six".