243506195925029 has 2 divisors, whose sum is σ = 243506195925030. Its totient is φ = 243506195925028.

The previous prime is 243506195924951. The next prime is 243506195925049. The reversal of 243506195925029 is 920529591605342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134172028060225 + 109334167864804 = 11583265^2 + 10456298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243506195925029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243506195925049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121753097962514 + 121753097962515.

It is an arithmetic number, because the mean of its divisors is an integer number (121753097962515).

Almost surely, 2^{243506195925029} is an apocalyptic number.

It is an amenable number.

243506195925029 is a deficient number, since it is larger than the sum of its proper divisors (1).

243506195925029 is an equidigital number, since it uses as much as digits as its factorization.

243506195925029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488000, while the sum is 62.

The spelling of 243506195925029 in words is "two hundred forty-three trillion, five hundred six billion, one hundred ninety-five million, nine hundred twenty-five thousand, twenty-nine".