971109 has 20 divisors (see below), whose sum is σ = 1529440. Its totient is φ = 612360.

The previous prime is 971099. The next prime is 971111. The reversal of 971109 is 901179.

It is not a de Polignac number, because 971109 - 2⁴ = 971093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971149) 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 19 ways as a sum of consecutive naturals, for example, 1224 + ... + 1854.

It is an arithmetic number, because the mean of its divisors is an integer number (76472).

2⁹⁷¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

971109 is a deficient number, since it is larger than the sum of its proper divisors (558331).

971109 is a wasteful number, since it uses less digits than its factorization.

971109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 653 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 971109 is about 985.4486287981. The cubic root of 971109 is about 99.0275405472.

The spelling of 971109 in words is "nine hundred seventy-one thousand, one hundred nine".