999363205 has 4 divisors (see below), whose sum is σ = 1199235852. Its totient is φ = 799490560.

The previous prime is 999363203. The next prime is 999363217. The reversal of 999363205 is 502363999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502363999 = 23 ⋅21841913.

It can be written as a sum of positive squares in 2 ways, for example, as 444619396 + 554743809 = 21086^2 + 23553^2 .

It is not a de Polignac number, because 999363205 - 2¹ = 999363203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999363203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99936316 + ... + 99936325.

It is an arithmetic number, because the mean of its divisors is an integer number (299808963).

Almost surely, 2^999363205 is an apocalyptic number.

It is an amenable number.

999363205 is a deficient number, since it is larger than the sum of its proper divisors (199872647).

999363205 is a wasteful number, since it uses less digits than its factorization.

999363205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199872646.

The product of its (nonzero) digits is 393660, while the sum is 46.

The square root of 999363205 is about 31612.7063852496. The cubic root of 999363205 is about 999.7876899276.

The spelling of 999363205 in words is "nine hundred ninety-nine million, three hundred sixty-three thousand, two hundred five".