999887612 has 24 divisors (see below), whose sum is σ = 1784689200. Its totient is φ = 489996416.

The previous prime is 999887611. The next prime is 999887633. The reversal of 999887612 is 216788999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999887611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 271439 + ... + 275097.

It is an arithmetic number, because the mean of its divisors is an integer number (74362050).

Almost surely, 2^999887612 is an apocalyptic number.

It is an amenable number.

999887612 is a deficient number, since it is larger than the sum of its proper divisors (784801588).

999887612 is a wasteful number, since it uses less digits than its factorization.

999887612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005 (or 5003 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 59.

The square root of 999887612 is about 31620.9995414440. Note that the first 3 decimals coincide. The cubic root of 999887612 is about 999.9625359298.

The spelling of 999887612 in words is "nine hundred ninety-nine million, eight hundred eighty-seven thousand, six hundred twelve".