1889011 has 2 divisors, whose sum is σ = 1889012.
Its totient is φ = 1889010.
The previous prime is 1889009. The next prime is 1889029. The reversal of 1889011 is 1109881.
It is a weak prime.
It is an emirp because it is prime and its reverse (1109881) is a distict prime.
It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 1106881 and 1886011.
It is a cyclic number.
It is not a de Polignac number, because 1889011 - 21 = 1889009 is a prime.
Together with 1889009, it forms a pair of twin primes.
It is not a weakly prime, because it can be changed into another prime (1889051) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 944505 + 944506.
It is an arithmetic number, because the mean of its divisors is an integer number (944506).
21889011 is an apocalyptic number.
1889011 is a deficient number, since it is larger than the sum of its proper divisors (1).
1889011 is an equidigital number, since it uses as much as digits as its factorization.
1889011 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 576, while the sum is 28.
The square root of 1889011 is about 1374.4129655966.
The cubic root of 1889011 is about 123.6169893523.
The spelling of 1889011 in words is "one million, eight hundred eighty-nine thousand, eleven".