2180129629 has 2 divisors, whose sum is σ = 2180129630. Its totient is φ = 2180129628.

The previous prime is 2180129617. The next prime is 2180129647. The reversal of 2180129629 is 9269210812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1732807129 + 447322500 = 41627^2 + 21150^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180129629 - 2²¹ = 2178032477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2180129591 and 2180129600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2180126629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090064814 + 1090064815.

It is an arithmetic number, because the mean of its divisors is an integer number (1090064815).

Almost surely, 2^2180129629 is an apocalyptic number.

It is an amenable number.

2180129629 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180129629 is an equidigital number, since it uses as much as digits as its factorization.

2180129629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 2180129629 is about 46691.8582731508. The cubic root of 2180129629 is about 1296.6639570643.

The spelling of 2180129629 in words is "two billion, one hundred eighty million, one hundred twenty-nine thousand, six hundred twenty-nine".