5172129871 has 2 divisors, whose sum is σ = 5172129872. Its totient is φ = 5172129870.

The previous prime is 5172129847. The next prime is 5172129877. The reversal of 5172129871 is 1789212715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5172129871 - 2⁹ = 5172129359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5172129877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2586064935 + 2586064936.

It is an arithmetic number, because the mean of its divisors is an integer number (2586064936).

Almost surely, 2^5172129871 is an apocalyptic number.

5172129871 is a deficient number, since it is larger than the sum of its proper divisors (1).

5172129871 is an equidigital number, since it uses as much as digits as its factorization.

5172129871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 43.

The square root of 5172129871 is about 71917.5213073977. The cubic root of 5172129871 is about 1729.3775112384.

The spelling of 5172129871 in words is "five billion, one hundred seventy-two million, one hundred twenty-nine thousand, eight hundred seventy-one".