999670899 has 8 divisors (see below), whose sum is σ = 1337237440. Its totient is φ = 664275816.

The previous prime is 999670877. The next prime is 999670943. The reversal of 999670899 is 998076999.

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

It is not a de Polignac number, because 999670899 - 2²⁸ = 731235443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999670849) 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, 541789 + ... + 543630.

It is an arithmetic number, because the mean of its divisors is an integer number (167154680).

Almost surely, 2^999670899 is an apocalyptic number.

999670899 is a deficient number, since it is larger than the sum of its proper divisors (337566541).

999670899 is a wasteful number, since it uses less digits than its factorization.

999670899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085729.

The product of its (nonzero) digits is 19840464, while the sum is 66.

The square root of 999670899 is about 31617.5726297893. The cubic root of 999670899 is about 999.8902876303.

The spelling of 999670899 in words is "nine hundred ninety-nine million, six hundred seventy thousand, eight hundred ninety-nine".