1988873 has 4 divisors (see below), whose sum is σ = 1991808. Its totient is φ = 1985940.

The previous prime is 1988851. The next prime is 1988887. The reversal of 1988873 is 3788891.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3788891 = 337 ⋅11243.

It is a cyclic number.

It is not a de Polignac number, because 1988873 - 2¹⁰ = 1987849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988843) 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, 128 + ... + 1998.

It is an arithmetic number, because the mean of its divisors is an integer number (497952).

2^1988873 is an apocalyptic number.

It is an amenable number.

1988873 is a deficient number, since it is larger than the sum of its proper divisors (2935).

1988873 is a wasteful number, since it uses less digits than its factorization.

1988873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934.

The product of its digits is 96768, while the sum is 44.

The square root of 1988873 is about 1410.2740868356. The cubic root of 1988873 is about 125.7580179782.

The spelling of 1988873 in words is "one million, nine hundred eighty-eight thousand, eight hundred seventy-three".