611997 has 4 divisors (see below), whose sum is σ = 816000. Its totient is φ = 407996.

The previous prime is 611993. The next prime is 611999. The reversal of 611997 is 799116.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611997 - 2² = 611993 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611993) 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, 101997 + ... + 102002.

It is an arithmetic number, because the mean of its divisors is an integer number (204000).

2⁶¹¹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

611997 is a deficient number, since it is larger than the sum of its proper divisors (204003).

611997 is a wasteful number, since it uses less digits than its factorization.

611997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204002.

The product of its digits is 3402, while the sum is 33.

The square root of 611997 is about 782.3023712095. The cubic root of 611997 is about 84.9017087590.

It can be divided in two parts, 6119 and 97, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 611997 in words is "six hundred eleven thousand, nine hundred ninety-seven".