243422109613 has 2 divisors, whose sum is σ = 243422109614. Its totient is φ = 243422109612.

The previous prime is 243422109611. The next prime is 243422109647. The reversal of 243422109613 is 316901224342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137186529769 + 106235579844 = 370387^2 + 325938^2 .

It is a cyclic number.

It is not a de Polignac number, because 243422109613 - 2¹ = 243422109611 is a prime.

Together with 243422109611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243422109611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711054806 + 121711054807.

It is an arithmetic number, because the mean of its divisors is an integer number (121711054807).

Almost surely, 2^243422109613 is an apocalyptic number.

It is an amenable number.

243422109613 is a deficient number, since it is larger than the sum of its proper divisors (1).

243422109613 is an equidigital number, since it uses as much as digits as its factorization.

243422109613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 243422109613 in words is "two hundred forty-three billion, four hundred twenty-two million, one hundred nine thousand, six hundred thirteen".