243025439 has 2 divisors, whose sum is σ = 243025440. Its totient is φ = 243025438.

The previous prime is 243025397. The next prime is 243025501. The reversal of 243025439 is 934520342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243025439 is a prime.

It is a super-2 number, since 2×243025439² = 118122728002285442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243025639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121512719 + 121512720.

It is an arithmetic number, because the mean of its divisors is an integer number (121512720).

Almost surely, 2^243025439 is an apocalyptic number.

243025439 is a deficient number, since it is larger than the sum of its proper divisors (1).

243025439 is an equidigital number, since it uses as much as digits as its factorization.

243025439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 243025439 is about 15589.2732030714. The cubic root of 243025439 is about 624.0469219798.

The spelling of 243025439 in words is "two hundred forty-three million, twenty-five thousand, four hundred thirty-nine".