5611999 has 4 divisors (see below), whose sum is σ = 5640400. Its totient is φ = 5583600.

The previous prime is 5611997. The next prime is 5612029. The reversal of 5611999 is 9991165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9991165 = 5 ⋅1998233.

It is a cyclic number.

It is not a de Polignac number, because 5611999 - 2¹ = 5611997 is a prime.

It is a super-3 number, since 3×5611999³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5611997) 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, 13902 + ... + 14299.

It is an arithmetic number, because the mean of its divisors is an integer number (1410100).

Almost surely, 2^5611999 is an apocalyptic number.

5611999 is a deficient number, since it is larger than the sum of its proper divisors (28401).

5611999 is a wasteful number, since it uses less digits than its factorization.

5611999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28400.

The product of its digits is 21870, while the sum is 40.

The square root of 5611999 is about 2368.9658081112. The cubic root of 5611999 is about 177.7075427274.

The spelling of 5611999 in words is "five million, six hundred eleven thousand, nine hundred ninety-nine".