5981611 has 4 divisors (see below), whose sum is σ = 6018472. Its totient is φ = 5944752.

The previous prime is 5981609. The next prime is 5981629. The reversal of 5981611 is 1161895.

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

It is a cyclic number.

It is not a de Polignac number, because 5981611 - 2¹ = 5981609 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5981641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18186 + ... + 18511.

It is an arithmetic number, because the mean of its divisors is an integer number (1504618).

Almost surely, 2^5981611 is an apocalyptic number.

5981611 is a deficient number, since it is larger than the sum of its proper divisors (36861).

5981611 is a wasteful number, since it uses less digits than its factorization.

5981611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36860.

The product of its digits is 2160, while the sum is 31.

The square root of 5981611 is about 2445.7332233913. The cubic root of 5981611 is about 181.5262302499.

It can be divided in two parts, 598 and 1611, that added together give a square (2209 = 47²).

The spelling of 5981611 in words is "five million, nine hundred eighty-one thousand, six hundred eleven".