2020171129 has 2 divisors, whose sum is σ = 2020171130. Its totient is φ = 2020171128.

The previous prime is 2020171123. The next prime is 2020171157. The reversal of 2020171129 is 9211710202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1967099904 + 53071225 = 44352^2 + 7285^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020171129 - 2¹⁵ = 2020138361 is a prime.

It is not a weakly prime, because it can be changed into another prime (2020171123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010085564 + 1010085565.

It is an arithmetic number, because the mean of its divisors is an integer number (1010085565).

Almost surely, 2^2020171129 is an apocalyptic number.

It is an amenable number.

2020171129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020171129 is an equidigital number, since it uses as much as digits as its factorization.

2020171129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 2020171129 is about 44946.3138533073. The cubic root of 2020171129 is about 1264.1425611067.

The spelling of 2020171129 in words is "two billion, twenty million, one hundred seventy-one thousand, one hundred twenty-nine".