1089389 has 4 divisors (see below), whose sum is σ = 1245024. Its totient is φ = 933756.

The previous prime is 1089383. The next prime is 1089397. The reversal of 1089389 is 9839801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9839801 = 1889 ⋅5209.

It is a cyclic number.

It is not a de Polignac number, because 1089389 - 2⁸ = 1089133 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 (1089383) 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, 77807 + ... + 77820.

It is an arithmetic number, because the mean of its divisors is an integer number (311256).

2^1089389 is an apocalyptic number.

It is an amenable number.

1089389 is a deficient number, since it is larger than the sum of its proper divisors (155635).

1089389 is an equidigital number, since it uses as much as digits as its factorization.

1089389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155634.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1089389 is about 1043.7379939429. The cubic root of 1089389 is about 102.8950135203.

The spelling of 1089389 in words is "one million, eighty-nine thousand, three hundred eighty-nine".