1091093 has 6 divisors (see below), whose sum is σ = 1122786. Its totient is φ = 1060272.

The previous prime is 1091071. The next prime is 1091119. The reversal of 1091093 is 3901901.

It can be written as a sum of positive squares in 3 ways, for example, as 605284 + 485809 = 778^2 + 697^2 .

It is not a de Polignac number, because 1091093 - 2¹⁴ = 1074709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 971 + ... + 1767.

It is an arithmetic number, because the mean of its divisors is an integer number (187131).

2^1091093 is an apocalyptic number.

It is an amenable number.

1091093 is a deficient number, since it is larger than the sum of its proper divisors (31693).

1091093 is an frugal number, since it uses more digits than its factorization.

1091093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 1091093 is about 1044.5539717985. The cubic root of 1091093 is about 102.9486343312.

Adding to 1091093 its reverse (3901901), we get a palindrome (4992994).

The spelling of 1091093 in words is "one million, ninety-one thousand, ninety-three".