2123115439 has 2 divisors, whose sum is σ = 2123115440. Its totient is φ = 2123115438.

The previous prime is 2123115437. The next prime is 2123115469. The reversal of 2123115439 is 9345113212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123115439 - 2¹ = 2123115437 is a prime.

Together with 2123115437, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2123115439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123115437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061557719 + 1061557720.

It is an arithmetic number, because the mean of its divisors is an integer number (1061557720).

Almost surely, 2^2123115439 is an apocalyptic number.

2123115439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123115439 is an equidigital number, since it uses as much as digits as its factorization.

2123115439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 2123115439 is about 46077.2768184058. The cubic root of 2123115439 is about 1285.2606251177.

The spelling of 2123115439 in words is "two billion, one hundred twenty-three million, one hundred fifteen thousand, four hundred thirty-nine".