5206780129 has 2 divisors, whose sum is σ = 5206780130. Its totient is φ = 5206780128.

The previous prime is 5206780127. The next prime is 5206780207. The reversal of 5206780129 is 9210876025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3058643025 + 2148137104 = 55305^2 + 46348^2 .

It is a cyclic number.

It is not a de Polignac number, because 5206780129 - 2¹ = 5206780127 is a prime.

It is a super-2 number, since 2×5206780129² = 54221118623498513282, which contains 22 as substring.

Together with 5206780127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 5206780091 and 5206780100.

It is not a weakly prime, because it can be changed into another prime (5206780127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2603390064 + 2603390065.

It is an arithmetic number, because the mean of its divisors is an integer number (2603390065).

Almost surely, 2^5206780129 is an apocalyptic number.

It is an amenable number.

5206780129 is a deficient number, since it is larger than the sum of its proper divisors (1).

5206780129 is an equidigital number, since it uses as much as digits as its factorization.

5206780129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 5206780129 is about 72158.0219310369. The cubic root of 5206780129 is about 1733.2308596676.

The spelling of 5206780129 in words is "five billion, two hundred six million, seven hundred eighty thousand, one hundred twenty-nine".