243102439 has 4 divisors (see below), whose sum is σ = 243397224. Its totient is φ = 242807656.

The previous prime is 243102421. The next prime is 243102443. The reversal of 243102439 is 934201342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934201342 = 2 ⋅467100671.

It is a cyclic number.

It is not a de Polignac number, because 243102439 - 2⁷ = 243102311 is a prime.

It is a Duffinian number.

243102439 is a modest number, since divided by 2439 gives 2431 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243102539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146152 + ... + 147805.

It is an arithmetic number, because the mean of its divisors is an integer number (60849306).

Almost surely, 2^243102439 is an apocalyptic number.

243102439 is a deficient number, since it is larger than the sum of its proper divisors (294785).

243102439 is an equidigital number, since it uses as much as digits as its factorization.

243102439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294784.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 243102439 is about 15591.7426543668. The cubic root of 243102439 is about 624.1128225417.

The spelling of 243102439 in words is "two hundred forty-three million, one hundred two thousand, four hundred thirty-nine".