999000993 has 8 divisors (see below), whose sum is σ = 1332164800. Its totient is φ = 665918928.

The previous prime is 999000991. The next prime is 999001007. The reversal of 999000993 is 399000999.

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

It is not a de Polignac number, because 999000993 - 2¹ = 999000991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999000991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18903 + ... + 48531.

It is an arithmetic number, because the mean of its divisors is an integer number (166520600).

Almost surely, 2^999000993 is an apocalyptic number.

It is an amenable number.

999000993 is a deficient number, since it is larger than the sum of its proper divisors (333163807).

999000993 is a wasteful number, since it uses less digits than its factorization.

999000993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40871.

The product of its (nonzero) digits is 177147, while the sum is 48.

The square root of 999000993 is about 31606.9769671191. The cubic root of 999000993 is about 999.6668867145. Note that the first 3 decimals are identical.

The spelling of 999000993 in words is "nine hundred ninety-nine million, nine hundred ninety-three", and thus it is an aban number.