999996887 has 4 divisors (see below), whose sum is σ = 1000074120. Its totient is φ = 999919656.

The previous prime is 999996827. The next prime is 999996901. The reversal of 999996887 is 788699999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 788699999 = 887 ⋅889177.

It is a cyclic number.

It is not a de Polignac number, because 999996887 - 2²⁸ = 731561431 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 (999996827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13937 + ... + 46842.

It is an arithmetic number, because the mean of its divisors is an integer number (250018530).

Almost surely, 2^999996887 is an apocalyptic number.

999996887 is a deficient number, since it is larger than the sum of its proper divisors (77233).

999996887 is a wasteful number, since it uses less digits than its factorization.

999996887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77232.

The product of its digits is 158723712, while the sum is 74.

The square root of 999996887 is about 31622.7273807937. The cubic root of 999996887 is about 999.9989623323.

The spelling of 999996887 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, eight hundred eighty-seven".