1089493 has 4 divisors (see below), whose sum is σ = 1116108. Its totient is φ = 1062880.

The previous prime is 1089481. The next prime is 1089497. The reversal of 1089493 is 3949801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3949801 = 71 ⋅55631.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 438244 = 807^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 1089493 - 2⁵ = 1089461 is a prime.

It is a Duffinian number.

1089493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13246 + ... + 13327.

It is an arithmetic number, because the mean of its divisors is an integer number (279027).

2^1089493 is an apocalyptic number.

It is an amenable number.

1089493 is a deficient number, since it is larger than the sum of its proper divisors (26615).

1089493 is an equidigital number, since it uses as much as digits as its factorization.

1089493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26614.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 1089493 is about 1043.7878136863. The cubic root of 1089493 is about 102.8982877535.

The spelling of 1089493 in words is "one million, eighty-nine thousand, four hundred ninety-three".