243423013 has 8 divisors (see below), whose sum is σ = 251991000. Its totient is φ = 234866688.

The previous prime is 243422999. The next prime is 243423031. The reversal of 243423013 is 310324342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43850884 + 199572129 = 6622^2 + 14127^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243423013 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 (243423073) 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 7 ways as a sum of consecutive naturals, for example, 78313 + ... + 81361.

It is an arithmetic number, because the mean of its divisors is an integer number (31498875).

Almost surely, 2^243423013 is an apocalyptic number.

It is an amenable number.

243423013 is a deficient number, since it is larger than the sum of its proper divisors (8567987).

243423013 is a wasteful number, since it uses less digits than its factorization.

243423013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243423013 is about 15602.0195167164. The cubic root of 243423013 is about 624.3870367983.

Adding to 243423013 its reverse (310324342), we get a palindrome (553747355).

It can be divided in two parts, 2434230 and 13, that multiplied together give a triangular number (31644990 = T₇₉₅₅).

The spelling of 243423013 in words is "two hundred forty-three million, four hundred twenty-three thousand, thirteen".