5781999 has 4 divisors (see below), whose sum is σ = 7709336. Its totient is φ = 3854664.

The previous prime is 5781977. The next prime is 5782001. The reversal of 5781999 is 9991875.

5781999 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5781999 - 2¹² = 5777903 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5781499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 963664 + ... + 963669.

It is an arithmetic number, because the mean of its divisors is an integer number (1927334).

Almost surely, 2^5781999 is an apocalyptic number.

5781999 is a deficient number, since it is larger than the sum of its proper divisors (1927337).

5781999 is a wasteful number, since it uses less digits than its factorization.

5781999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927336.

The product of its digits is 204120, while the sum is 48.

The square root of 5781999 is about 2404.5787572879. The cubic root of 5781999 is about 179.4841092587.

The spelling of 5781999 in words is "five million, seven hundred eighty-one thousand, nine hundred ninety-nine".