1889123 has 4 divisors (see below), whose sum is σ = 1907568. Its totient is φ = 1870680.

The previous prime is 1889117. The next prime is 1889131. The reversal of 1889123 is 3219881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1889123 - 2¹⁸ = 1626979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1889123.

It is not an unprimeable number, because it can be changed into a prime (1889143) 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, 9068 + ... + 9273.

It is an arithmetic number, because the mean of its divisors is an integer number (476892).

2^1889123 is an apocalyptic number.

1889123 is a deficient number, since it is larger than the sum of its proper divisors (18445).

1889123 is a wasteful number, since it uses less digits than its factorization.

1889123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18444.

The product of its digits is 3456, while the sum is 32.

The square root of 1889123 is about 1374.4537096607. The cubic root of 1889123 is about 123.6194323995.

The spelling of 1889123 in words is "one million, eight hundred eighty-nine thousand, one hundred twenty-three".