1989093 has 4 divisors (see below), whose sum is σ = 2652128. Its totient is φ = 1326060.

The previous prime is 1989077. The next prime is 1989101. The reversal of 1989093 is 3909891.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3909891 = 3 ⋅1303297.

It is not a de Polignac number, because 1989093 - 2⁴ = 1989077 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989073) 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 in 3 ways as a sum of consecutive naturals, for example, 331513 + ... + 331518.

It is an arithmetic number, because the mean of its divisors is an integer number (663032).

2^1989093 is an apocalyptic number.

It is an amenable number.

1989093 is a deficient number, since it is larger than the sum of its proper divisors (663035).

1989093 is an equidigital number, since it uses as much as digits as its factorization.

1989093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663034.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1989093 is about 1410.3520837011. The cubic root of 1989093 is about 125.7626547321.

The spelling of 1989093 in words is "one million, nine hundred eighty-nine thousand, ninety-three".