1089217 has 2 divisors, whose sum is σ = 1089218. Its totient is φ = 1089216.

The previous prime is 1089197. The next prime is 1089223. The reversal of 1089217 is 7129801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583696 + 505521 = 764^2 + 711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089217 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1089227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 544608 + 544609.

It is an arithmetic number, because the mean of its divisors is an integer number (544609).

2^1089217 is an apocalyptic number.

It is an amenable number.

1089217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1089217 is an equidigital number, since it uses as much as digits as its factorization.

1089217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1089217 is about 1043.6555945330. The cubic root of 1089217 is about 102.8895979849.

The spelling of 1089217 in words is "one million, eighty-nine thousand, two hundred seventeen".