1089817 has 4 divisors (see below), whose sum is σ = 1104820. Its totient is φ = 1074816.

The previous prime is 1089799. The next prime is 1089841. The reversal of 1089817 is 7189801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7189801 = 41 ⋅175361.

It can be written as a sum of positive squares in 2 ways, for example, as 793881 + 295936 = 891^2 + 544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089817 is a prime.

It is a Duffinian number.

1089817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1089877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7392 + ... + 7537.

It is an arithmetic number, because the mean of its divisors is an integer number (276205).

2^1089817 is an apocalyptic number.

It is an amenable number.

1089817 is a deficient number, since it is larger than the sum of its proper divisors (15003).

1089817 is an equidigital number, since it uses as much as digits as its factorization.

1089817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 1089817 is about 1043.9430061071. The cubic root of 1089817 is about 102.9084869137.

The spelling of 1089817 in words is "one million, eighty-nine thousand, eight hundred seventeen".