243129049 has 2 divisors, whose sum is σ = 243129050. Its totient is φ = 243129048.

The previous prime is 243128971. The next prime is 243129097. The reversal of 243129049 is 940921342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233111824 + 10017225 = 15268^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 243129049 - 2⁹ = 243128537 is a prime.

It is a super-2 number, since 2×243129049² = 118223468935288802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (244129049) 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 as a sum of consecutive naturals, namely, 121564524 + 121564525.

It is an arithmetic number, because the mean of its divisors is an integer number (121564525).

Almost surely, 2^243129049 is an apocalyptic number.

It is an amenable number.

243129049 is a deficient number, since it is larger than the sum of its proper divisors (1).

243129049 is an equidigital number, since it uses as much as digits as its factorization.

243129049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 243129049 is about 15592.5959673173. The cubic root of 243129049 is about 624.1355935134.

The spelling of 243129049 in words is "two hundred forty-three million, one hundred twenty-nine thousand, forty-nine".