418793993 has 4 divisors (see below), whose sum is σ = 418859268. Its totient is φ = 418728720.

The previous prime is 418793989. The next prime is 418794007. The reversal of 418793993 is 399397814.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220463104 + 198330889 = 14848^2 + 14083^2 .

It is a cyclic number.

It is not a de Polignac number, because 418793993 - 2² = 418793989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (418793093) 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, 21818 + ... + 36243.

It is an arithmetic number, because the mean of its divisors is an integer number (104714817).

Almost surely, 2^418793993 is an apocalyptic number.

It is an amenable number.

418793993 is a deficient number, since it is larger than the sum of its proper divisors (65275).

418793993 is an equidigital number, since it uses as much as digits as its factorization.

418793993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65274.

The product of its digits is 1469664, while the sum is 53.

The square root of 418793993 is about 20464.4568215235. The cubic root of 418793993 is about 748.1697553131.

The spelling of 418793993 in words is "four hundred eighteen million, seven hundred ninety-three thousand, nine hundred ninety-three".