243201340073 has 2 divisors, whose sum is σ = 243201340074. Its totient is φ = 243201340072.

The previous prime is 243201340001. The next prime is 243201340079. The reversal of 243201340073 is 370043102342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207422860969 + 35778479104 = 455437^2 + 189152^2 .

It is a cyclic number.

It is not a de Polignac number, because 243201340073 - 2¹² = 243201335977 is a prime.

It is not a weakly prime, because it can be changed into another prime (243201340079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600670036 + 121600670037.

It is an arithmetic number, because the mean of its divisors is an integer number (121600670037).

Almost surely, 2^243201340073 is an apocalyptic number.

It is an amenable number.

243201340073 is a deficient number, since it is larger than the sum of its proper divisors (1).

243201340073 is an equidigital number, since it uses as much as digits as its factorization.

243201340073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

The spelling of 243201340073 in words is "two hundred forty-three billion, two hundred one million, three hundred forty thousand, seventy-three".