999359885 has 4 divisors (see below), whose sum is σ = 1199231868. Its totient is φ = 799487904.

The previous prime is 999359857. The next prime is 999359939. The reversal of 999359885 is 588953999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 588953999 = 73 ⋅8067863.

It can be written as a sum of positive squares in 2 ways, for example, as 204232681 + 795127204 = 14291^2 + 28198^2 .

It is a cyclic number.

It is not a de Polignac number, because 999359885 - 2⁸ = 999359629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99935984 + ... + 99935993.

It is an arithmetic number, because the mean of its divisors is an integer number (299807967).

Almost surely, 2^999359885 is an apocalyptic number.

It is an amenable number.

999359885 is a deficient number, since it is larger than the sum of its proper divisors (199871983).

999359885 is a wasteful number, since it uses less digits than its factorization.

999359885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199871982.

The product of its digits is 31492800, while the sum is 65.

The square root of 999359885 is about 31612.6538746749. The cubic root of 999359885 is about 999.7865827897.

The spelling of 999359885 in words is "nine hundred ninety-nine million, three hundred fifty-nine thousand, eight hundred eighty-five".