5991999 has 8 divisors (see below), whose sum is σ = 8603952. Its totient is φ = 3687360.

The previous prime is 5991991. The next prime is 5992003. The reversal of 5991999 is 9991995.

5991999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 5991999 - 2³ = 5991991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991991) 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, 76782 + ... + 76859.

It is an arithmetic number, because the mean of its divisors is an integer number (1075494).

Almost surely, 2^5991999 is an apocalyptic number.

5991999 is a deficient number, since it is larger than the sum of its proper divisors (2611953).

5991999 is a wasteful number, since it uses less digits than its factorization.

5991999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153657.

The product of its digits is 295245, while the sum is 51.

The square root of 5991999 is about 2447.8560006667. The cubic root of 5991999 is about 181.6312523435.

The spelling of 5991999 in words is "five million, nine hundred ninety-one thousand, nine hundred ninety-nine".