1163889 has 10 divisors (see below), whose sum is σ = 1738770. Its totient is φ = 775872.

The previous prime is 1163879. The next prime is 1163891. The reversal of 1163889 is 9883611.

1163889 is a `hidden beast` number, since 11 + 638 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 129600 = 1017^2 + 360^2 .

It is not a de Polignac number, because 1163889 - 2⁴ = 1163873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1163849) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7104 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (173877).

2^1163889 is an apocalyptic number.

It is an amenable number.

1163889 is a deficient number, since it is larger than the sum of its proper divisors (574881).

1163889 is an equidigital number, since it uses as much as digits as its factorization.

1163889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14381 (or 14372 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1163889 is about 1078.8368736746. The cubic root of 1163889 is about 105.1890471810.

It can be divided in two parts, 116 and 3889, that added together give a triangular number (4005 = T₈₉).

The spelling of 1163889 in words is "one million, one hundred sixty-three thousand, eight hundred eighty-nine".