611983 has 4 divisors (see below), whose sum is σ = 648000. Its totient is φ = 575968.

The previous prime is 611977. The next prime is 611993. The reversal of 611983 is 389116.

It is a happy number.

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 611983 - 2⁵ = 611951 is a prime.

It is a Duffinian number.

611983 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17983 + ... + 18016.

It is an arithmetic number, because the mean of its divisors is an integer number (162000).

2⁶¹¹⁹⁸³ is an apocalyptic number.

611983 is a deficient number, since it is larger than the sum of its proper divisors (36017).

611983 is a wasteful number, since it uses less digits than its factorization.

611983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36016.

The product of its digits is 1296, while the sum is 28.

The square root of 611983 is about 782.2934232115. The cubic root of 611983 is about 84.9010613523.

The spelling of 611983 in words is "six hundred eleven thousand, nine hundred eighty-three".