243511936139 has 2 divisors, whose sum is σ = 243511936140. Its totient is φ = 243511936138.

The previous prime is 243511936127. The next prime is 243511936141. The reversal of 243511936139 is 931639115342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243511936139 - 2²⁴ = 243495158923 is a prime.

Together with 243511936141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243511936093 and 243511936102.

It is not a weakly prime, because it can be changed into another prime (243511926139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121755968069 + 121755968070.

It is an arithmetic number, because the mean of its divisors is an integer number (121755968070).

Almost surely, 2^243511936139 is an apocalyptic number.

243511936139 is a deficient number, since it is larger than the sum of its proper divisors (1).

243511936139 is an equidigital number, since it uses as much as digits as its factorization.

243511936139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 47.

The spelling of 243511936139 in words is "two hundred forty-three billion, five hundred eleven million, nine hundred thirty-six thousand, one hundred thirty-nine".