243213079 has 2 divisors, whose sum is σ = 243213080. Its totient is φ = 243213078.

The previous prime is 243213049. The next prime is 243213119. The reversal of 243213079 is 970312342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243213079 - 2¹³ = 243204887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243213079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243213049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606539 + 121606540.

It is an arithmetic number, because the mean of its divisors is an integer number (121606540).

Almost surely, 2^243213079 is an apocalyptic number.

243213079 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213079 is an equidigital number, since it uses as much as digits as its factorization.

243213079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 243213079 is about 15595.2902826462. The cubic root of 243213079 is about 624.2074895883.

The spelling of 243213079 in words is "two hundred forty-three million, two hundred thirteen thousand, seventy-nine".