971597 has 4 divisors (see below), whose sum is σ = 1059936. Its totient is φ = 883260.

The previous prime is 971591. The next prime is 971639. The reversal of 971597 is 795179.

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 971597 - 2¹⁰ = 970573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 971597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44153 + ... + 44174.

It is an arithmetic number, because the mean of its divisors is an integer number (264984).

2⁹⁷¹⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

971597 is a deficient number, since it is larger than the sum of its proper divisors (88339).

971597 is a wasteful number, since it uses less digits than its factorization.

971597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88338.

The product of its digits is 19845, while the sum is 38.

The square root of 971597 is about 985.6962006623. The cubic root of 971597 is about 99.0441254851.

The spelling of 971597 in words is "nine hundred seventy-one thousand, five hundred ninety-seven".