9989197 has 2 divisors, whose sum is σ = 9989198. Its totient is φ = 9989196.

The previous prime is 9989191. The next prime is 9989227. The reversal of 9989197 is 7919899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5541316 + 4447881 = 2354^2 + 2109^2 .

It is a cyclic number.

It is not a de Polignac number, because 9989197 - 2¹⁹ = 9464909 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9989191) 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 as a sum of consecutive naturals, namely, 4994598 + 4994599.

It is an arithmetic number, because the mean of its divisors is an integer number (4994599).

Almost surely, 2^9989197 is an apocalyptic number.

It is an amenable number.

9989197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989197 is an equidigital number, since it uses as much as digits as its factorization.

9989197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 52.

The square root of 9989197 is about 3160.5690943246. The cubic root of 9989197 is about 215.3658598562.

It can be divided in two parts, 99 and 89197, that multiplied together give a triangular number (8830503 = T₄₂₀₂).

The spelling of 9989197 in words is "nine million, nine hundred eighty-nine thousand, one hundred ninety-seven".