993999999 has 8 divisors (see below), whose sum is σ = 1325478960. Its totient is φ = 662593856.

The previous prime is 993999983. The next prime is 994000037. The reversal of 993999999 is 999999399.

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 993999999 - 2⁴ = 993999983 is a prime.

993999999 is a modest number, since divided by 99999 gives 9939 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 993999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993999199) 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, 45067 + ... + 63395.

It is an arithmetic number, because the mean of its divisors is an integer number (165684870).

Almost surely, 2^993999999 is an apocalyptic number.

993999999 is a deficient number, since it is larger than the sum of its proper divisors (331478961).

993999999 is a wasteful number, since it uses less digits than its factorization.

993999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36409.

The product of its digits is 129140163, while the sum is 75.

The square root of 993999999 is about 31527.7655250099. The cubic root of 993999999 is about 997.9959862784.

The spelling of 993999999 in words is "nine hundred ninety-three million, nine hundred ninety-nine thousand, nine hundred ninety-nine".