999999086 has 4 divisors (see below), whose sum is σ = 1499998632. Its totient is φ = 499999542.

The previous prime is 999999067. The next prime is 999999103. The reversal of 999999086 is 680999999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680999999 = 2267 ⋅300397.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249999770 + ... + 249999773.

It is an arithmetic number, because the mean of its divisors is an integer number (374999658).

Almost surely, 2^999999086 is an apocalyptic number.

999999086 is a deficient number, since it is larger than the sum of its proper divisors (499999546).

999999086 is a wasteful number, since it uses less digits than its factorization.

999999086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499999545.

The product of its (nonzero) digits is 25509168, while the sum is 68.

The square root of 999999086 is about 31622.7621500716. The cubic root of 999999086 is about 999.9996953332. Note that the first 3 decimals are identical.

The spelling of 999999086 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, eighty-six".