9197989 has 2 divisors, whose sum is σ = 9197990. Its totient is φ = 9197988.

The previous prime is 9197983. The next prime is 9198019. The reversal of 9197989 is 9897919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8584900 + 613089 = 2930^2 + 783^2 .

It is an emirp because it is prime and its reverse (9897919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9197989 - 2¹¹ = 9195941 is a prime.

9197989 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9197983) 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, 4598994 + 4598995.

It is an arithmetic number, because the mean of its divisors is an integer number (4598995).

Almost surely, 2^9197989 is an apocalyptic number.

It is an amenable number.

9197989 is a deficient number, since it is larger than the sum of its proper divisors (1).

9197989 is an equidigital number, since it uses as much as digits as its factorization.

9197989 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 9197989 is about 3032.8186559701. The cubic root of 9197989 is about 209.5226421037.

The spelling of 9197989 in words is "nine million, one hundred ninety-seven thousand, nine hundred eighty-nine".