971194897 has 4 divisors (see below), whose sum is σ = 971944996. Its totient is φ = 970444800.

The previous prime is 971194841. The next prime is 971194909. The reversal of 971194897 is 798491179.

It is a Cunningham number, because it is equal to 31164²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798491179 = 89 ⋅8971811.

It can be written as a sum of positive squares in 2 ways, for example, as 968205456 + 2989441 = 31116^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 971194897 - 2⁷ = 971194769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971194817) 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, 373104 + ... + 375697.

It is an arithmetic number, because the mean of its divisors is an integer number (242986249).

Almost surely, 2^971194897 is an apocalyptic number.

It is an amenable number.

971194897 is a deficient number, since it is larger than the sum of its proper divisors (750099).

971194897 is a wasteful number, since it uses less digits than its factorization.

971194897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750098.

The product of its digits is 1143072, while the sum is 55.

The square root of 971194897 is about 31164.0000160442. Note that the first 4 decimals coincide. The cubic root of 971194897 is about 990.3046020501.

The spelling of 971194897 in words is "nine hundred seventy-one million, one hundred ninety-four thousand, eight hundred ninety-seven".