5127138689 has 2 divisors, whose sum is σ = 5127138690. Its totient is φ = 5127138688.

The previous prime is 5127138677. The next prime is 5127138697. The reversal of 5127138689 is 9868317215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5074140289 + 52998400 = 71233^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 5127138689 - 2³² = 832171393 is a prime.

It is a super-2 number, since 2×5127138689² = 52575102272481277442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5127138659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2563569344 + 2563569345.

It is an arithmetic number, because the mean of its divisors is an integer number (2563569345).

Almost surely, 2^5127138689 is an apocalyptic number.

It is an amenable number.

5127138689 is a deficient number, since it is larger than the sum of its proper divisors (1).

5127138689 is an equidigital number, since it uses as much as digits as its factorization.

5127138689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 50.

The square root of 5127138689 is about 71604.0410102670. The cubic root of 5127138689 is about 1724.3484133195.

The spelling of 5127138689 in words is "five billion, one hundred twenty-seven million, one hundred thirty-eight thousand, six hundred eighty-nine".