2138838463 has 2 divisors, whose sum is σ = 2138838464. Its totient is φ = 2138838462.

The previous prime is 2138838433. The next prime is 2138838491. The reversal of 2138838463 is 3648388312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2138838463 - 2¹³ = 2138830271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2138838433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069419231 + 1069419232.

It is an arithmetic number, because the mean of its divisors is an integer number (1069419232).

Almost surely, 2^2138838463 is an apocalyptic number.

2138838463 is a deficient number, since it is larger than the sum of its proper divisors (1).

2138838463 is an equidigital number, since it uses as much as digits as its factorization.

2138838463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The square root of 2138838463 is about 46247.5779149568. The cubic root of 2138838463 is about 1288.4255500648.

The spelling of 2138838463 in words is "two billion, one hundred thirty-eight million, eight hundred thirty-eight thousand, four hundred sixty-three".