1889393 has 4 divisors (see below), whose sum is σ = 2061168. Its totient is φ = 1717620.

The previous prime is 1889389. The next prime is 1889399. The reversal of 1889393 is 3939881.

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 1889393 - 2² = 1889389 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 1889393.

It is not an unprimeable number, because it can be changed into a prime (1889399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85871 + ... + 85892.

It is an arithmetic number, because the mean of its divisors is an integer number (515292).

2^1889393 is an apocalyptic number.

It is an amenable number.

1889393 is a deficient number, since it is larger than the sum of its proper divisors (171775).

1889393 is a wasteful number, since it uses less digits than its factorization.

1889393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171774.

The product of its digits is 46656, while the sum is 41.

The square root of 1889393 is about 1374.5519269929. The cubic root of 1889393 is about 123.6253214914.

The spelling of 1889393 in words is "one million, eight hundred eighty-nine thousand, three hundred ninety-three".