1988093 has 4 divisors (see below), whose sum is σ = 1998588. Its totient is φ = 1977600.

The previous prime is 1988089. The next prime is 1988101. The reversal of 1988093 is 3908891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3908891 = 7 ⋅558413.

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 683929 = 1142^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1988093 - 2² = 1988089 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1988023) 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, 4958 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (499647).

2^1988093 is an apocalyptic number.

It is an amenable number.

1988093 is a deficient number, since it is larger than the sum of its proper divisors (10495).

1988093 is a wasteful number, since it uses less digits than its factorization.

1988093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10494.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1988093 is about 1409.9975177283. The cubic root of 1988093 is about 125.7415758223.

The spelling of 1988093 in words is "one million, nine hundred eighty-eight thousand, ninety-three".