1089197 has 2 divisors, whose sum is σ = 1089198. Its totient is φ = 1089196.

The previous prime is 1089191. The next prime is 1089217. The reversal of 1089197 is 7919801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687241 + 401956 = 829^2 + 634^2 .

It is an emirp because it is prime and its reverse (7919801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1089197 - 2⁶ = 1089133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1089191) 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, 544598 + 544599.

It is an arithmetic number, because the mean of its divisors is an integer number (544599).

2^1089197 is an apocalyptic number.

It is an amenable number.

1089197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089197 is an equidigital number, since it uses as much as digits as its factorization.

1089197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 1089197 is about 1043.6460127840. The cubic root of 1089197 is about 102.8889682345. Note that the first 3 decimals are identical.

The spelling of 1089197 in words is "one million, eighty-nine thousand, one hundred ninety-seven".