243201193 has 4 divisors (see below), whose sum is σ = 244545028. Its totient is φ = 241857360.

The previous prime is 243201187. The next prime is 243201229. The reversal of 243201193 is 391102342.

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 20684304 + 222516889 = 4548^2 + 14917^2 .

It is a cyclic number.

It is not a de Polignac number, because 243201193 - 2¹³ = 243193001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243201113) 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, 671646 + ... + 672007.

It is an arithmetic number, because the mean of its divisors is an integer number (61136257).

Almost surely, 2^243201193 is an apocalyptic number.

It is an amenable number.

243201193 is a deficient number, since it is larger than the sum of its proper divisors (1343835).

243201193 is a wasteful number, since it uses less digits than its factorization.

243201193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343834.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 243201193 is about 15594.9092014029. The cubic root of 243201193 is about 624.1973209314.

The spelling of 243201193 in words is "two hundred forty-three million, two hundred one thousand, one hundred ninety-three".