1087889 has 4 divisors (see below), whose sum is σ = 1186800. Its totient is φ = 988980.

The previous prime is 1087873. The next prime is 1087897. The reversal of 1087889 is 9887801.

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.

It is a cyclic number.

It is not a de Polignac number, because 1087889 - 2⁴ = 1087873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1087829) 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, 49439 + ... + 49460.

It is an arithmetic number, because the mean of its divisors is an integer number (296700).

2^1087889 is an apocalyptic number.

It is an amenable number.

1087889 is a deficient number, since it is larger than the sum of its proper divisors (98911).

1087889 is an equidigital number, since it uses as much as digits as its factorization.

1087889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98910.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 1087889 is about 1043.0191752792. The cubic root of 1087889 is about 102.8477658082.

It can be divided in two parts, 108 and 7889, that added together give a palindrome (7997).

The spelling of 1087889 in words is "one million, eighty-seven thousand, eight hundred eighty-nine".