2139127643 has 2 divisors, whose sum is σ = 2139127644. Its totient is φ = 2139127642.

The previous prime is 2139127631. The next prime is 2139127681. The reversal of 2139127643 is 3467219312.

It is an a-pointer prime, because the next prime (2139127681) can be obtained adding 2139127643 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2139127643 - 2³⁰ = 1065385819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2139127597 and 2139127606.

It is not a weakly prime, because it can be changed into another prime (2139127043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1069563821 + 1069563822.

It is an arithmetic number, because the mean of its divisors is an integer number (1069563822).

Almost surely, 2^2139127643 is an apocalyptic number.

2139127643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139127643 is an equidigital number, since it uses as much as digits as its factorization.

2139127643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 2139127643 is about 46250.7042432869. The cubic root of 2139127643 is about 1288.4836143080.

The spelling of 2139127643 in words is "two billion, one hundred thirty-nine million, one hundred twenty-seven thousand, six hundred forty-three".