6418393 has 4 divisors (see below), whose sum is σ = 6484660. Its totient is φ = 6352128.

The previous prime is 6418387. The next prime is 6418397. The reversal of 6418393 is 3938146.

6418393 = T₄₇ + T₄₈ + ... + T₃₃₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3938146 = 2 ⋅1969073.

It can be written as a sum of positive squares in 2 ways, for example, as 3003289 + 3415104 = 1733^2 + 1848^2 .

It is a cyclic number.

It is not a de Polignac number, because 6418393 - 2⁵ = 6418361 is a prime.

It is a super-3 number, since 3×6418393³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6418397) 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, 32988 + ... + 33181.

It is an arithmetic number, because the mean of its divisors is an integer number (1621165).

Almost surely, 2^6418393 is an apocalyptic number.

It is an amenable number.

6418393 is a deficient number, since it is larger than the sum of its proper divisors (66267).

6418393 is an equidigital number, since it uses as much as digits as its factorization.

6418393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66266.

The product of its digits is 15552, while the sum is 34.

The square root of 6418393 is about 2533.4547558620. The cubic root of 6418393 is about 185.8412431139.

The spelling of 6418393 in words is "six million, four hundred eighteen thousand, three hundred ninety-three".