5611987 has 4 divisors (see below), whose sum is σ = 5695816. Its totient is φ = 5528160.

The previous prime is 5611981. The next prime is 5611997. The reversal of 5611987 is 7891165.

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 5611987 - 2¹¹ = 5609939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5611981) 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, 41814 + ... + 41947.

It is an arithmetic number, because the mean of its divisors is an integer number (1423954).

Almost surely, 2^5611987 is an apocalyptic number.

5611987 is a deficient number, since it is larger than the sum of its proper divisors (83829).

5611987 is an equidigital number, since it uses as much as digits as its factorization.

5611987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83828.

The product of its digits is 15120, while the sum is 37.

The square root of 5611987 is about 2368.9632753591. The cubic root of 5611987 is about 177.7074160647.

The spelling of 5611987 in words is "five million, six hundred eleven thousand, nine hundred eighty-seven".