999359887 has 4 divisors (see below), whose sum is σ = 999649000. Its totient is φ = 999070776.

The previous prime is 999359857. The next prime is 999359939. The reversal of 999359887 is 788953999.

999359887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999359887 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 (999359857) 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, 139308 + ... + 146305.

It is an arithmetic number, because the mean of its divisors is an integer number (249912250).

Almost surely, 2^999359887 is an apocalyptic number.

999359887 is a deficient number, since it is larger than the sum of its proper divisors (289113).

999359887 is a wasteful number, since it uses less digits than its factorization.

999359887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289112.

The product of its digits is 44089920, while the sum is 67.

The square root of 999359887 is about 31612.6539063078. The cubic root of 999359887 is about 999.7865834566.

The spelling of 999359887 in words is "nine hundred ninety-nine million, three hundred fifty-nine thousand, eight hundred eighty-seven".