8861999 has 8 divisors (see below), whose sum is σ = 9546240. Its totient is φ = 8199576.

The previous prime is 8861989. The next prime is 8862013. The reversal of 8861999 is 9991688.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8861999 - 2²⁰ = 7813423 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 (8861929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4607 + ... + 6240.

It is an arithmetic number, because the mean of its divisors is an integer number (1193280).

Almost surely, 2^8861999 is an apocalyptic number.

8861999 is a deficient number, since it is larger than the sum of its proper divisors (684241).

8861999 is a wasteful number, since it uses less digits than its factorization.

8861999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10909.

The product of its digits is 279936, while the sum is 50.

The square root of 8861999 is about 2976.9109828814. The cubic root of 8861999 is about 206.9397399021.

The spelling of 8861999 in words is "eight million, eight hundred sixty-one thousand, nine hundred ninety-nine".