243609053 has 4 divisors (see below), whose sum is σ = 247738080. Its totient is φ = 239480028.

The previous prime is 243609043. The next prime is 243609059. The reversal of 243609053 is 350906342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350906342 = 2 ⋅175453171.

It is a cyclic number.

It is not a de Polignac number, because 243609053 - 2²⁰ = 242560477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243609059) 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, 2064425 + ... + 2064542.

It is an arithmetic number, because the mean of its divisors is an integer number (61934520).

Almost surely, 2^243609053 is an apocalyptic number.

It is an amenable number.

243609053 is a deficient number, since it is larger than the sum of its proper divisors (4129027).

243609053 is an equidigital number, since it uses as much as digits as its factorization.

243609053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129026.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 243609053 is about 15607.9804266920. The cubic root of 243609053 is about 624.5460622780.

The spelling of 243609053 in words is "two hundred forty-three million, six hundred nine thousand, fifty-three".