2018393 has 8 divisors (see below), whose sum is σ = 2301768. Its totient is φ = 1753344.

The previous prime is 2018383. The next prime is 2018407. The reversal of 2018393 is 3938102.

It can be written as a sum of positive squares in 4 ways, for example, as 473344 + 1545049 = 688^2 + 1243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2018393 - 2¹⁰ = 2017369 is a prime.

It is a super-3 number, since 3×2018393³ = 24668256111272833371, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4346 + ... + 4787.

It is an arithmetic number, because the mean of its divisors is an integer number (287721).

2^2018393 is an apocalyptic number.

It is an amenable number.

2018393 is a deficient number, since it is larger than the sum of its proper divisors (283375).

2018393 is a wasteful number, since it uses less digits than its factorization.

2018393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9163.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2018393 is about 1420.7015872448. The cubic root of 2018393 is about 126.3771558153.

The spelling of 2018393 in words is "two million, eighteen thousand, three hundred ninety-three".