243021029 has 2 divisors, whose sum is σ = 243021030. Its totient is φ = 243021028.

The previous prime is 243021017. The next prime is 243021041. The reversal of 243021029 is 920120342.

It is a balanced prime because it is at equal distance from previous prime (243021017) and next prime (243021041).

It can be written as a sum of positive squares in only one way, i.e., 241336225 + 1684804 = 15535^2 + 1298^2 .

It is a cyclic number.

It is not a de Polignac number, because 243021029 - 2¹² = 243016933 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243020995 and 243021013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243021089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121510514 + 121510515.

It is an arithmetic number, because the mean of its divisors is an integer number (121510515).

Almost surely, 2^243021029 is an apocalyptic number.

It is an amenable number.

243021029 is a deficient number, since it is larger than the sum of its proper divisors (1).

243021029 is an equidigital number, since it uses as much as digits as its factorization.

243021029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 243021029 is about 15589.1317590172. The cubic root of 243021029 is about 624.0431472534.

The spelling of 243021029 in words is "two hundred forty-three million, twenty-one thousand, twenty-nine".