985971197 has 4 divisors (see below), whose sum is σ = 986434716. Its totient is φ = 985507680.

The previous prime is 985971167. The next prime is 985971229. The reversal of 985971197 is 791179589.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791179589 = 19 ⋅41641031.

It can be written as a sum of positive squares in 2 ways, for example, as 218625796 + 767345401 = 14786^2 + 27701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985971197 is a prime.

It is a super-2 number, since 2×985971197² = 1944278402627225618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985971167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228554 + ... + 232827.

It is an arithmetic number, because the mean of its divisors is an integer number (246608679).

Almost surely, 2^985971197 is an apocalyptic number.

It is an amenable number.

985971197 is a deficient number, since it is larger than the sum of its proper divisors (463519).

985971197 is a wasteful number, since it uses less digits than its factorization.

985971197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463518.

The product of its digits is 1428840, while the sum is 56.

The square root of 985971197 is about 31400.1782956721. The cubic root of 985971197 is about 995.3016928132.

The spelling of 985971197 in words is "nine hundred eighty-five million, nine hundred seventy-one thousand, one hundred ninety-seven".