611971 has 8 divisors (see below), whose sum is σ = 665600. Its totient is φ = 560520.

The previous prime is 611969. The next prime is 611977. The reversal of 611971 is 179116.

611971 = T₁₈₃ + T₁₈₄ + ... + T₂₁₃.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 611971 - 2¹ = 611969 is a prime.

It is a Duffinian number.

611971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (611977) 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, 70 + ... + 1108.

It is an arithmetic number, because the mean of its divisors is an integer number (83200).

2⁶¹¹⁹⁷¹ is an apocalyptic number.

611971 is a deficient number, since it is larger than the sum of its proper divisors (53629).

611971 is a wasteful number, since it uses less digits than its factorization.

611971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089.

The product of its digits is 378, while the sum is 25.

The square root of 611971 is about 782.2857534175. The cubic root of 611971 is about 84.9005064243.

The spelling of 611971 in words is "six hundred eleven thousand, nine hundred seventy-one".