1091017 has 2 divisors, whose sum is σ = 1091018. Its totient is φ = 1091016.

The previous prime is 1091003. The next prime is 1091021. The reversal of 1091017 is 7101901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 112896 = 989^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091017 - 2⁷ = 1090889 is a prime.

1091017 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1090985 and 1091003.

It is not a weakly prime, because it can be changed into another prime (1091047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545508 + 545509.

It is an arithmetic number, because the mean of its divisors is an integer number (545509).

2^1091017 is an apocalyptic number.

It is an amenable number.

1091017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091017 is an equidigital number, since it uses as much as digits as its factorization.

1091017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63, while the sum is 19.

The square root of 1091017 is about 1044.5175920012. The cubic root of 1091017 is about 102.9462439826.

Adding to 1091017 its reverse (7101901), we get a palindrome (8192918).

The spelling of 1091017 in words is "one million, ninety-one thousand, seventeen".