999983915 has 32 divisors (see below), whose sum is σ = 1410393600. Its totient is φ = 680316000.

The previous prime is 999983893. The next prime is 999983921. The reversal of 999983915 is 519389999.

999983915 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999983915 - 2¹² = 999979819 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222440 + ... + 226890.

It is an arithmetic number, because the mean of its divisors is an integer number (44074800).

Almost surely, 2^999983915 is an apocalyptic number.

999983915 is a deficient number, since it is larger than the sum of its proper divisors (410409685).

999983915 is a wasteful number, since it uses less digits than its factorization.

999983915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608 (or 4594 counting only the distinct ones).

The product of its digits is 7085880, while the sum is 62.

The square root of 999983915 is about 31622.5222744803. The cubic root of 999983915 is about 999.9946383046.

The spelling of 999983915 in words is "nine hundred ninety-nine million, nine hundred eighty-three thousand, nine hundred fifteen".