243428093 has 4 divisors (see below), whose sum is σ = 244041660. Its totient is φ = 242814528.

The previous prime is 243428077. The next prime is 243428131. The reversal of 243428093 is 390824342.

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 197486809 + 45941284 = 14053^2 + 6778^2 .

It is a cyclic number.

It is not a de Polignac number, because 243428093 - 2⁴ = 243428077 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 (243428993) 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, 306188 + ... + 306981.

It is an arithmetic number, because the mean of its divisors is an integer number (61010415).

Almost surely, 2^243428093 is an apocalyptic number.

It is an amenable number.

243428093 is a deficient number, since it is larger than the sum of its proper divisors (613567).

243428093 is an equidigital number, since it uses as much as digits as its factorization.

243428093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613566.

The product of its (nonzero) digits is 41472, while the sum is 35.

The square root of 243428093 is about 15602.1823153045. The cubic root of 243428093 is about 624.3913802168.

The spelling of 243428093 in words is "two hundred forty-three million, four hundred twenty-eight thousand, ninety-three".