1089847 has 6 divisors (see below), whose sum is σ = 1198064. Its totient is φ = 990660.

The previous prime is 1089841. The next prime is 1089863. The reversal of 1089847 is 7489801.

It is not a de Polignac number, because 1089847 - 2¹¹ = 1087799 is a prime.

It is a Duffinian number.

1089847 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089841) 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, 4383 + ... + 4624.

2^1089847 is an apocalyptic number.

1089847 is a deficient number, since it is larger than the sum of its proper divisors (108217).

1089847 is an equidigital number, since it uses as much as digits as its factorization.

1089847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029 (or 9018 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1089847 is about 1043.9573746088. The cubic root of 1089847 is about 102.9094311781.

It can be divided in two parts, 1089 and 847, that added together give a square (1936 = 44²).

The spelling of 1089847 in words is "one million, eighty-nine thousand, eight hundred forty-seven".