971611 has 4 divisors (see below), whose sum is σ = 976192. Its totient is φ = 967032.

The previous prime is 971591. The next prime is 971639. The reversal of 971611 is 116179.

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 971611 - 2⁷ = 971483 is a prime.

It is a Duffinian number.

971611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (971651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1956 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (244048).

2⁹⁷¹⁶¹¹ is an apocalyptic number.

971611 is a deficient number, since it is larger than the sum of its proper divisors (4581).

971611 is a wasteful number, since it uses less digits than its factorization.

971611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580.

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

The square root of 971611 is about 985.7033022162. The cubic root of 971611 is about 99.0446012005.

The spelling of 971611 in words is "nine hundred seventy-one thousand, six hundred eleven".