243129629 has 2 divisors, whose sum is σ = 243129630. Its totient is φ = 243129628.

The previous prime is 243129617. The next prime is 243129647. The reversal of 243129629 is 926921342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156825529 + 86304100 = 12523^2 + 9290^2 .

It is a cyclic number.

It is not a de Polignac number, because 243129629 - 2⁴ = 243129613 is a prime.

It is a super-2 number, since 2×243129629² = 118224032995355282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243129592 and 243129601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243129829) 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, 121564814 + 121564815.

It is an arithmetic number, because the mean of its divisors is an integer number (121564815).

Almost surely, 2^243129629 is an apocalyptic number.

It is an amenable number.

243129629 is a deficient number, since it is larger than the sum of its proper divisors (1).

243129629 is an equidigital number, since it uses as much as digits as its factorization.

243129629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 243129629 is about 15592.6145658770. The cubic root of 243129629 is about 624.1360898183.

The spelling of 243129629 in words is "two hundred forty-three million, one hundred twenty-nine thousand, six hundred twenty-nine".