243426613 has 4 divisors (see below), whose sum is σ = 256238560. Its totient is φ = 230614668.

The previous prime is 243426607. The next prime is 243426637. The reversal of 243426613 is 316624342.

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.

It is a cyclic number.

It is not a de Polignac number, because 243426613 - 2⁹ = 243426101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243426653) 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, 6405945 + ... + 6405982.

It is an arithmetic number, because the mean of its divisors is an integer number (64059640).

Almost surely, 2^243426613 is an apocalyptic number.

It is an amenable number.

243426613 is a deficient number, since it is larger than the sum of its proper divisors (12811947).

243426613 is a wasteful number, since it uses less digits than its factorization.

243426613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12811946.

The product of its digits is 20736, while the sum is 31.

The square root of 243426613 is about 15602.1348859699. The cubic root of 243426613 is about 624.3901148177.

The spelling of 243426613 in words is "two hundred forty-three million, four hundred twenty-six thousand, six hundred thirteen".