243313093 has 2 divisors, whose sum is σ = 243313094. Its totient is φ = 243313092.

The previous prime is 243313039. The next prime is 243313117. The reversal of 243313093 is 390313342.

Together with previous prime (243313039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183683809 + 59629284 = 13553^2 + 7722^2 .

It is a cyclic number.

It is not a de Polignac number, because 243313093 - 2¹⁷ = 243182021 is a prime.

It is a super-2 number, since 2×243313093² = 118402522450453298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243313003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121656546 + 121656547.

It is an arithmetic number, because the mean of its divisors is an integer number (121656547).

Almost surely, 2^243313093 is an apocalyptic number.

It is an amenable number.

243313093 is a deficient number, since it is larger than the sum of its proper divisors (1).

243313093 is an equidigital number, since it uses as much as digits as its factorization.

243313093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 243313093 is about 15598.4964980603. The cubic root of 243313093 is about 624.2930399936.

The spelling of 243313093 in words is "two hundred forty-three million, three hundred thirteen thousand, ninety-three".