2020129729 has 2 divisors, whose sum is σ = 2020129730. Its totient is φ = 2020129728.

The previous prime is 2020129697. The next prime is 2020129747. The reversal of 2020129729 is 9279210202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1012194225 + 1007935504 = 31815^2 + 31748^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020129729 - 2⁵ = 2020129697 is a prime.

It is a super-2 number, since 2×2020129729² = 8161848243979226882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2020129694 and 2020129703.

It is not a weakly prime, because it can be changed into another prime (2020129759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010064864 + 1010064865.

It is an arithmetic number, because the mean of its divisors is an integer number (1010064865).

Almost surely, 2^2020129729 is an apocalyptic number.

It is an amenable number.

2020129729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020129729 is an equidigital number, since it uses as much as digits as its factorization.

2020129729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 2020129729 is about 44945.8533015005. The cubic root of 2020129729 is about 1264.1339255578.

The spelling of 2020129729 in words is "two billion, twenty million, one hundred twenty-nine thousand, seven hundred twenty-nine".