1001889 has 48 divisors (see below), whose sum is σ = 1863680. Its totient is φ = 524880.

The previous prime is 1001839. The next prime is 1001911. The reversal of 1001889 is 9881001.

1001889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1001889 - 2¹² = 997793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32304 + ... + 32334.

2^1001889 is an apocalyptic number.

1001889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1001889 is a deficient number, since it is larger than the sum of its proper divisors (861791).

1001889 is an equidigital number, since it uses as much as digits as its factorization.

1001889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1001889 is about 1000.9440543807. The cubic root of 1001889 is about 100.0629270602.

The spelling of 1001889 in words is "one million, one thousand, eight hundred eighty-nine".