999550005 has 32 divisors (see below), whose sum is σ = 1728969600. Its totient is φ = 491380992.

The previous prime is 999549997. The next prime is 999550009. The reversal of 999550005 is 500055999.

It is not a de Polignac number, because 999550005 - 2³ = 999549997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999550009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36850 + ... + 57939.

It is an arithmetic number, because the mean of its divisors is an integer number (54030300).

Almost surely, 2^999550005 is an apocalyptic number.

999550005 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

999550005 is a deficient number, since it is larger than the sum of its proper divisors (729419595).

999550005 is a wasteful number, since it uses less digits than its factorization.

999550005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94853.

The product of its (nonzero) digits is 91125, while the sum is 42.

The square root of 999550005 is about 31615.6607553915. The cubic root of 999550005 is about 999.8499791615.

The spelling of 999550005 in words is "nine hundred ninety-nine million, five hundred fifty thousand, five".