611987 has 8 divisors (see below), whose sum is σ = 648000. Its totient is φ = 577024.

The previous prime is 611977. The next prime is 611993. The reversal of 611987 is 789116.

611987 is digitally balanced in base 2, 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611987 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 611987.

It is not an unprimeable number, because it can be changed into a prime (611927) 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, 1139 + ... + 1587.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2⁶¹¹⁹⁸⁷ is an apocalyptic number.

611987 is a deficient number, since it is larger than the sum of its proper divisors (36013).

611987 is a wasteful number, since it uses less digits than its factorization.

611987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 3024, while the sum is 32.

The square root of 611987 is about 782.2959797928. The cubic root of 611987 is about 84.9012463266.

It can be divided in two parts, 61 and 1987, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 611987 in words is "six hundred eleven thousand, nine hundred eighty-seven".